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Four studies investigated the impact of a recipient's perception of a helper's motivation (autonomous vs. controlled) on the recipient's subsequent prosocial intentions, alongside testing a mediational mechanism. Study 1 employed a questionnaire method to assess the relationships between participants' lay theories of helper's prosocial motivations (i.e., the degree of autonomy), their dispositional gratitude and their prosocial tendencies. Studies 2–4 manipulated a helper's autonomous versus controlled motivation within hypothetical scenarios (Studies 2 and 3) and within recalled events (Study 4), testing the effect of the helper's motivation on the recipient's prosocial intentions towards the helper (Studies 2–4), a bystander (Study 3) and others in general (Study 4) as well as the mediating role of gratitude. The findings consistently demonstrated that perceiving helpers as having autonomous motivation led to heightened intentions among recipients to engage in prosocial behaviour, which was mediated by increased feelings of gratitude. These effects remained robust after controlling for relevant factors including participants' demographic information, social desirability bias and perceptions of egoism within helpers. Our findings highlight the role of perceived helper's autonomous motivation on recipient's prosocial behaviours, which enhances the knowledge regarding reciprocity and pay‐it‐forward behaviour. [ABSTRACT FROM AUTHOR]

Background: Materialistic values among today's adolescents have been a concern around the world, yet few studies concerning Chinese adolescents' materialistic values have been conducted. Additionally, the joint effects of parental rejection and self-esteem on materialistic values remain unclear. Objective: We examined materialistic values in a sample of adolescents in mainland China, and tested whether parental rejection was positively correlated with adolescents' materialistic values and whether the process was moderated by self-esteem. Methods: We recruited 593 adolescents from 7th to 12th grade (299 boys; age: M = 16.41, SD = 1.84) and asked them to complete a questionnaire containing parental rejection (parental rejection subscale from s-EMBU; Arrindell et al. in Personal Individ Differ, 27(4):613-628, 1999), self-esteem (Self-Esteem Scale; Rosenberg in Society and the adolescent self-image. Princeton University Press, Princeton, 1965), materialistic values (Youth Materialism Scale; Goldberg et al. in J Consum Psychol 13(3):278-288, 2003), and demographic information. Results: Chinese adolescents did not strongly endorse materialistic values and the 7th grade students had a significantly lower level of materialistic values than students from the other five grades. No gender difference was found. Parental rejection was positively correlated with adolescents' materialistic values, and the relationship was moderated by self-esteem. If faced with parental rejection, adolescents with higher self-esteem were less susceptive, without being as materialistic as those with lower self-esteem. Conclusion: Parental rejection might thwart adolescents' basic psychological needs. Therefore, adolescents pursued materialistic aspirations to compensate their needs. Adolescents with higher self-esteem were less materialistic, because they coped with parental rejection more effectively than those with lower self-esteem.

Understanding future dry and wet changes under global climate change is of great regional significance in China. Based on six Global Climate Models (GCM) from the Coupled Model Intercomparison Project phase 6 (CMIP6), we project the changes of dry‐wet climate regions in China in the 21st century under the three SSP‐RCP (shared socioeconomic pathway‐representative concentration pathway) scenarios (SSP1‐2.6, SSP2‐4.5 and SSP5‐8.5), and further identify the key climatic factors that lead to the transition of dry‐wet climate regions. The results show the area of humid and subhumid regions in China will show an upward trend in the future, while the area of semiarid and arid regions will show a downward trend. Especially under the SSP5‐8.5 scenario, the area of the subhumid region has the largest increase trend (0.042% per year), and the area of the arid region has the largest decline trend (−0.048% per year). The three main transfer directions of dry‐wet climate regions are from arid to semiarid regions, from semiarid to subhumid regions, and from subhumid to humid regions in the future. Due to the future extensive wetting trend in the north, the future dry‐wet climate regions will shift to wetter types in Tibet, North China, the Qinling‐Huaihe regions and the northeast. In addition, the key climatic factors for the transition of dry‐wet climate regions are mainly precipitation, maximum temperature and solar radiation. The increase of precipitation plays a dominant role for areas projected to change to wetter types, and the increase of potential evapotranspiration (PET) plays a dominant role for areas projected to change to drier types. The PET changes in changed areas of dry‐wet climate regions are mainly dominated by maximum temperature and solar radiation. Our research has important implications for future water resource management and reconsideration of climate mitigation and adaptation policies. [ABSTRACT FROM AUTHOR]

People are increasingly relying on social networking sites (SNSs) to satisfy their needs for relatedness. However, the psychological benefits of receiving others' feedback on SNSs remain relatively understudied. To fill this research gap, the present research examined whether and how others' feedback to one's status updates on WeChat Moments (i.e. the most popular SNS in China) affects loneliness. A correlational study (N = 261) and an experimental study (N = 412) conducted among Chinese university students indicated that receiving more (vs. less) feedback in the forms of "likes" and "comments" predicted lower loneliness, and this effect was explained by a higher sense of social connectedness. However, receiving feedback only elicited higher social connectedness and thus lower loneliness among participants with high public self‐consciousness, but this effect was not significant among those with low public self‐consciousness. These findings extend the research on SNS use and loneliness by providing new insights into the underlying psychological mechanisms and have important practical implications for SNS developers and users in terms of how to design and use SNSs to better satisfy different users' psychological needs. [ABSTRACT FROM AUTHOR]

Social power predicts numerous important life outcomes and social orientations. Thus far, the research literature has mainly examined how an individual's own power shapes interactions with others, whereas whether a target's power affects social interactions has been relatively neglected. In particular, does a target's power have an effect on the agent's prosocial behavior? Furthermore, could culture along with the power distance dimension alter the effect of a target's power on prosocial behavior? To explore these two research questions, we investigated the effect of a target's power (power unspecified targets vs. powerful targets) on prosocial behavior in both China and the United States. Questionnaires measuring prosocial behavior toward power unspecified or powerful targets were distributed to Chinese and American emerging adults (nin total = 893). According to the results, both Chinese and Americans were less likely to help powerful targets compared with power unspecified targets. Moreover, the Chinese were less prosocial toward both power unspecified and powerful targets in comparison to the Americans. These findings highlight the key roles of a target's power and culture in shaping an individual's prosocial behavior. [ABSTRACT FROM AUTHOR]

A scandal can evoke public outrage when it is widely publicized and involves an individual who is perceived to have a high level of cultural representativeness. Two experiments showed that when the scandalous target's moral character was highlighted, emotional responses towards the target were least negative when the scandal was widely circulated and when the target was seen as a representative of his culture. These results suggest that when a cultural symbol is implicated in a widely-circulated scandal, the negative emotions directed towards the scandalous individual can be alleviated when the public remains confident in his or her commitment to morality. [ABSTRACT FROM AUTHOR]

Abstract: Background: Even under immune pressure, the highly active influenza A H1N1 pdm09 variants emerged again in December 2010. Did the variability lead to poor vaccine effectiveness? Objectives: To study the genetic distance and antigenic drift of the influenza A H1N1 pdm09 strains based on the sequence analysis of HA virus gene segments during consecutive seasons 2009–2011 in Hangzhou, China. Study design: 39 Clinical samples from influenza-like-illness patients with culture-confirmed influenza A H1N1 pdm09 infections were collected over seasons in routine influenza surveillance. The HA gene was amplified and sequenced. A perspective analysis of genetic distance, antigenic drift and positively selected sites were conducted. Results: Analyses of human influenza A H1N1 pdm09 strains isolated in Hangzhou revealed that during the seasons 2009–2011, the antigenic drift had occurred, away from the northern hemisphere 2010/2011 influenza vaccine strain A/California/07/2009. The 2010/2011 viruses cluster in two main branches with a significant genetic distance, characterized by either S202T and S468N, or K180T/I, V216A, P288S, I312V and I389F. Interestingly, the epitopes corresponding to the immune-escape characteristic have altered much, but none of the amino acid substitutions in 2010/2011 variants were positively selected. Conclusions: The results of genetic surveillance in this study might account for frequent outbreaks of the influenza A H1N1 pdm09 strains since December 2010 and the disappearance after three months circulation. It facilitates early detection of antigenic sites for the virus to escape immunological restraint in 2010/2011 season. Continuous monitoring of antigenic changes is recommended. [Copyright &y& Elsevier]

Objective: This study explored how belief in a just world (BJW) develops among Chinese adolescents and the predictive role of family factors., Background: The development of BJW in adolescence is an important but understudied topic, especially in non-Western contexts., Method: Using a three-wave longitudinal design, 1525 participants (48% girls; M age  = 12.47) were recruited to report their BJW, childhood SES, only-child or not, and parental psychological control in Wave 1 (Wave 2: N = 1262; Wave 3: N = 1124)., Results: The mean slope for personal BJW is positive and significant, but not significant for general BJW. Childhood SES predicted initial level of personal and general BJW and the rate of growth of personal BJW. Only-child predicted initial level and the growth rate of personal BJW. Parental psychological control negatively predicted personal and general BJW at three time points., Conclusion: Personal BJW increased during the observation period, whereas general BJW was stable. Individuals with lower levels of childhood SES had lower initial personal and general BJW but a higher growth rate in personal BJW than those with higher SES. Individuals having siblings had lower levels of initial personal BJW but a higher growth rate in personal BJW than those from only-child family. Parental psychological control may exert consistent and contemporaneous negative effect on BJW across time., (© 2023 Wiley Periodicals LLC.)

Economic inequality has been found to reduce individuals' generosity in western contexts. However, whether this effect is cross-culturally consistent and its internal mechanism remain unclear, as well as how to mitigate this impact. Hence, we explored whether and why economic inequality may erode generosity in a sample of Chinese adults from the social norm perspective and introduced the equal allocation norm to mitigate this effect. Four online studies were conducted: two were correlational (Study 1: n = 300; Study 2: n = 568) and two were experimental (Study 3: n = 289; Study 4: n = 500). Results showed that economic inequality predicted less generosity in the dictator game, and perceived unequal allocation norm accounted for this effect. Moreover, introducing the equal allocation norm could buffer this negative effect. Findings suggest economic inequality impairs generosity, and making the equal allocation norm more salient may guide people to act more generously., (© 2023 International Union of Psychological Science.)

Despite evidence indicating a connection between inappropriate parenting styles and peer victimization, the dynamic processes and mechanisms underlying this link and whether it is consistent across genders and different developmental stages have yet to be explored. To address these gaps, the current 2-year longitudinal study explored the potential bidirectional associations between parental psychological control and peer victimization, as well as the mediating role of adolescent basic psychological need satisfaction. A total of 4,990 adolescents (49.4% boys, M age T1  = 12.21 years, SD age T1  = 2.60) across different developmental stages (early adolescents, N = 1,819, 49.2% boys, M age T1  = 9.34 years, SD age T1  = 0.62; middle adolescents, N = 1,525, 50.75% boys, M age T1  = 12.47 years, SD age T1  = 0.69; late adolescents, N = 1,646, 46.5% boys, M age T1  = 15.26 years, SD age T1  = 0.50) participated in this three-wave longitudinal survey. The results revealed that parental psychological control was bidirectionally associated with peer victimization. Additionally, basic psychological need satisfaction played the meditating role in this vicious cycle. Further analysis demonstrated interesting developmental differences. Parental psychological control was directly associated with subsequent peer victimization at all three developmental stages, and peer victimization was only directly associated with subsequent parental psychological control in the next year among early adolescents and middle adolescents. The mutual mediating role of basic psychological need satisfaction between parental psychological control and peer victimization was observed exclusively in early adolescents. Both male and female adolescents could be equally affected by these dynamics. This research underscores the reciprocal dynamics inherent in parent-child interactions, intervening in either of these processes (i.e., family, peers, and adolescent basic psychological need satisfaction) may break this destructive cycle., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

The global COVID-19 pandemic has disrupted personal and work lives and created great uncertainty and stress, especially for frontline health care professionals like doctors and nurses who risk personal health while facing increased workloads and new COVID-related tasks. People can passively respond to this disruption, or they can be more active and choose to shape the conditions surrounding their work during the crisis. We designed a multiwave, multisource study examining whether a proactive orientation is a key resource for frontline health care professionals in the COVID-19 pandemic. Drawing from proactive and conservation of resources theories, we studied a sample of 408 doctors and nurses at a COVID-19 hospital in the locked-down area surrounding Wuhan City, China during the first wave of the virus. Our aim is to examine how personal agency contributes to health care professionals' performance and well-being when combating COVID-19. Proactive personality as a dispositional resource was associated with higher levels of perceived strengths use, a job-related motivational resource. This effect was jointly moderated by routine disruption and perceived organizational support. Proactive personality was indirectly associated with performance and two indicators of well-being (resilience and thriving) through perceived strengths use. More frequent physical exposure to the virus magnified the effects of perceived strengths use on an archival indicator of performance during the first wave of the pandemic. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

The status-legitimacy hypothesis proposes that people with lower socioeconomic status (SES) are more likely to justify the social system than those with higher SES. However, empirical studies found inconsistent findings. In the present research, we argue that at least part of the confusion stems from the possibility that objective and subjective SES are differently related to system justification. On one hand, subjective SES is more related to status maintenance motivation and may increase system justification. On the other hand, objective SES is more related to access to information about the social reality, which may increase criticism about the system and lead to lower system justification. These hypotheses were supported by evidence from five studies (total N = 26,134) involving both adult and adolescent samples in China. We recommend that future research on status-related issues needs to distinguish the potential divergent roles of objective and subjective SES.

Background: Studies have found lower well-being among prisoners than in the general population. Positive psychological interventions provide fruitful ways of enhancing people's well-being, but little is known about whether these contribute to prisoners' well-being., Aims: To test the effects of two typical positive psychological interventions - kindness and gratitude - on Chinese prisoners' well-being., Methods: One hundred and forty-four participants were randomly assigned to three conditions: kindness or gratitude groups in addition to 'treatment as usual' and a control condition of treatment as usual alone, with 48 men in each condition. Participants completed established well-being measures before and after the 6-week intervention and a similar period in control conditions., Results: Both kindness and gratitude interventions significantly increased prisoners' well-being compared to the control group. The kindness intervention promoted higher well-being than the gratitude intervention., Conclusions: Although both kindness and gratitude interventions enhanced prisoners' happiness and mitigated negative affect, the weaker effect of the gratitude condition reflects Chinese strongly communal culture, so further cross-cultural studies would be of interest. Future research should also include longer term follow-up and expand the work to include women in prison., (© 2018 John Wiley & Sons, Ltd.)

Background: Human respiratory syncytial virus (RSV) is the most important viral pathogen in children. However, its epidemic patterns and co-infection characteristics are not fully understood., Objectives: We attempted to determine the level of genetic variation of RSV, and describe the prevalence and co-infection characteristics of RSV in Hangzhou during two epidemic seasons., Study Design: Single respiratory samples from 1820 pediatric patients were screened for RSV and genotyped by RT-PCR and sequencing. In all RSV positive specimens, we screened for viruses and atypical bacteria. Demographic and clinical information was recorded and analyzed., Results: A total of 34.5% and 3.8% of samples from acute lower respiratory tract infections (ALRI) and influenza-like illness (ILI) were positive for RSV, respectively. Phylogenetic analysis revealed that 61.1% of the selected 167 RSV strains were NA1, 31.1% were BA, 3.6% were ON1, 2.4% were CB1, and 1.8% were NA3. A new genotype, BA11 was identified, which comprised 98.1% of BA strains in this study, while the rest were BA10. A total of 36.4% and 9.1% of RSV-positive children with ALRI and ILI respectively were found to be co-infected. Rhinovirus was the most common additional respiratory virus, followed by human metapneumovirus. Except for fever, no significant differences in other clinical presentation between the RSV mono-infection and co-infection groups were observed., Conclusions: The circulating RSV strains had high genetic variability with RSV-B showing a more local pattern. In ALRI cases, co-infection of RSV with other viruses or atypical bacteria has no significant effect on the clinical presentation except fever., (Copyright © 2015 Elsevier B.V. All rights reserved.)

Background: This study aimed to evaluate the effects of standard rescue procedure (SRP) in improving severe trauma treatments in China., Methods: This study was conducted in 12 hospitals located in geographically and industrially different cities in China. A standard procedure on severe trauma rescue was established as a general rule for staff training and patient treatment. A regional network (system) efficiently integrating prehospital rescue, emergency room treatments, and hospital specialist treatments was built under the rule for information sharing and improving severe trauma treatments. Treatment outcomes were compared between before and 1 year after the implementation of the SRP., Results: The outcomes of a total of 74,615 and 12,051 trauma cases were collected from 12 hospitals before and after the implementation of the SRP. Implementation of the SRP led to efficient cooperation and information sharing of different treatment services. The emergency response time, prehospital transit time, emergency rescue time, consultation call time, and mortality rate of patients were 24.24 ± 4.32 min, 45.69 ± 3.89 min, 6.38 ± 1.05 min, 17.53 ± 0.72 min, and 33.82% ± 3.87% (n = 441), respectively, before the implementation of the standardization and significantly reduced to 10.11 ± 3.21 min, 22.39 ± 4.32 min, 3.26 ± 0.89 min, 3.45 ± 0.45 min, and 20.49% ± 3.11%, separately (n = 495, P < 0.05) after that., Conclusions: Staff training and SRP can significantly improve the efficiency of severe trauma treatments in China.

Two children with different digestive diseases were admitted to the gastroenterology department of a children's hospital in Hangzhou, Zhejiang Province, China, in May 2010. They manifested successively acute lower respiratory tract infection symptoms during their stay in the hospital. The epidemiologic and experimental evidence supports that one child acquired nosocomial coinfection with measles virus and human metapneumovirus from another child while they shared the same ward., (Copyright © 2015 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.)

We investigated the genetic diversity and evolution of the M gene of human influenza A viruses in Hangzhou (Zhejiang province, China) from 2009 to 2013, including subtypes of A(H1N1) pdm09 strains and seasonal A(H3N2) strains. Subtypes of analyzed viruses were identified by cell culture and real-time reverse transcription-polymerase chain reaction, followed by cloning, sequencing and phylogenetic analyses of the M gene. Assessment of 5675 throat swabs revealed a positive rate for the influenza virus of 20.46%, and 827 cases were diagnosed as. infections due to influenza A viruses. Seventy-six influenza-A strains were selected randomly from nine stages during six phases of a virus epidemic. Sequences of the M gene showed high homology among six epidemics with identities of amino-acid sequences of 98.98-100%. All strains contained the adamantine-resistant mutation S31N in its M2 protein. Two of the A(H1N1)pdm09 strains had double mutants of V27A/S31N or V271/S31N. One of the seasonal A(H3N2) viruses had another form of double-mutant R45H/S31N. Evolutionary rate of the M gene was much lower than that of the HA gene and NA gene. Compared with A(H3N2) strains, higher positive pressure on the M1 and M2 proteins of A(H1N1) pdm09 viruses was observed. Separate analyses of M1 and M2 proteins revealed very different selection pressures. Knowledge of the genetic diversity and evolution of the M gene of human influenza-A viruses will be valuable for the control and prevention of diseases.

Corruption can be unfair and detrimental to societies; however, little is known regarding how individuals perceive corruption. We aim to understand how psychological factors, such as lay belief of the world, influence perceived intention of corruptive behavior. As corruption undermines justice, we hypothesize that belief in a just world to others (BJW-others) reduces perceived intention of corruptive behaviors. We conducted two correlational studies and one experimental study in China. Using hypothetical scenarios, perception toward bribery taking and nepotistic practices were assessed. In Study 1 and Study 2, we consistently found that BJW-others negatively predicted perceived intention of corruption, and this pattern was mediated by perceived likelihood of punishment. We further replicate this result in Study 3 by priming BJW-others, demonstrating its causal effect. The results indicate that BJW as one lay belief can be important in influencing people's attitudes toward corruption. Implications for future research and anti-corruption policies are also discussed.

Unlabelled: Avian influenza virus A of the novel H7N9 reassortant subtype was recently found to cause severe human respiratory infections in China. Live poultry markets were suspected locations of the human H7N9 infection sources, based on the cases' exposure histories and sequence similarities between viral isolates. To explore the role of live poultry markets in the origin of the novel H7N9 virus, we systematically examined poultry and environmental specimens from local markets and farms in Hangzhou, using real-time reverse transcription-PCR (RT-PCR) as well as high-throughput next-generation sequencing (NGS). RT-PCR identified specimens positive for the H7 and N9 genomic segments in all of the 12 poultry markets epidemiologically linked to 10 human H7N9 cases. Chickens, ducks, and environmental specimens from the markets contained heavily mixed subtypes, including H7, N9, H9, and N2 and sometimes H5 and N1. The idea of the coexistence of H7N9 and H9N2 subtypes in chickens was further supported by metagenomic sequencing. In contrast, human H7N9 infection cases (n = 31) were all negative for H9N2 virus according to real-time RT-PCR. The six internal segments were indistinguishable for the H7N9 and H9N2 viruses. The H9, N2, and internal-segment sequences were very close to the sequence of the H9N2 virus circulating in chickens in China recently. Our results provide direct evidence that H9N2 strains coexisted with the novel human-pathogenic H7N9 influenza virus in epidemiologically linked live poultry markets. Avian influenza A virus of the H9N2 subtype likely made a recent contribution to the evolution of the H7N9 virus and continues to do so., Importance: Our results suggest that avian influenza A virus of the H9N2 subtype likely made a recent contribution to the evolution of the H7N9 virus, a novel reassortant avian influenza virus A subtype, and continues to do so. The finding helps shed light on how the H7N9 virus emerged, spread, and transmitted to humans. It is of considerable interest for assessing the risk of the possible emergence of novel reassortant viruses with enhanced transmissibility to humans.

Objective: To study the infection status and pathogenic features of human metapneumovirus (hMPV) among children with acute respiratory tract infection in Hangzhou., Methods: A total of 372 children less than 14 years old with acute respiratory tract infections were recruited as subjects from the pediatric clinic or intensive care unit (ICU) of 3 hospitals in Hangzhou during November 2009 to January 2010, and November 2010 to January 2011. A total of 372 specimens were collected, including 351 respiratory swab, 9 nasopharyngeal aspirate material, 8 endotracheal aspirate material and 4 sputum. The total nucleic acid was then extracted from the specimens, and the nucleoprotein (N) gene of hMPV was amplified by RT-PCR, whose positive products were sequenced and analyzed. Africa green monkey kidney cells (Vero-E6) were applied to culture hMPV among the positive samples; meanwhile fluorescence quantitative RT-PCR was adopted to test other respiratory virus infection., Results: Out of 372 patients, 42 (11.2%) were positive for N gene of hMPV. The positive rate of hMPV among boys was 11.5% (26/226), and correspondingly 10.9% (16/146) among girls. The difference showed no statistical significance (χ(2) = 0.026, P > 0.05). The youngest patient was only 2 month-old and the eldest patient was 14 years old. The median of the patients' age was 24 months. Fifteen positive samples amplified by RT-PCR were sequenced, and all turned out to be subtype B1; whose similarity to GD165 found in Guangdong was 98.1% - 99.5% and similarity to BJ1897 in Beijing was 87.8% - 89.2%. The co-infection rate between hMPV and other respiratory virus was 45.2% (19/42); most of which was between hMPV and respiratory syncytial virus, whose rate at 26.1% (11/42)., Conclusion: hMPV was the single genotype relevant with the acute respiratory tract infection disease among children in Hangzhou district; however, the co-infection with other respiratory virus did exist.

Background: Road traffic injuries (RTIs) are a worldwide issue associated with increasing development and motorization. However, statistical studies do not include any analyses of Beijing's geriatric population. Using data from the Beijing Emergency Medical Center, we present the main characteristics of traffic injuries involving the elderly in Beijing. We also provide objective information for those concerned with the safety of traffic systems and the prevention of traffic injuries., Methods: In a longitudinal, retrospective study, data were collected on 1706 victims aged 65 years and older who sustained traffic injuries in Beijing between 2004 and 2010. Personal information, time of injury event, emergency care response time, road user type, striking vehicle type, injury site, and severity of injury were analyzed using χ(2) tests and Logistic regression analysis., Results: The annual rate of traffic injuries was 21.80 per 100 000 elderly people in Beijing, and the morbidity rate decreased from 2004 to 2010 (P < 0.001). The mean age was (72.92 ± 5.67) years, and 911 (53.40%) of the victims were male. The majority of victims sustained head and lower limb injuries and were classified as being of medium severity. Traffic collisions occurred most frequently in the daytime excluding rush hours; these collisions included being hit by a car (85.64%) and pedestrian victim injuries (79.19%). Our statistical analysis found three factors for injury severity: abdominal injuries (P < 0.001), number of injury sites (P = 0.027), and head injuries (P = 0.034). The decline in traffic injuries is due to a decrease in victims aged 65-74 years and pedestrians; the severity of RTIs also decreased., Conclusions: This study highlights the declining trend in traffic injuries among older adults in Beijing. However, traffic injuries remain a serious public health problem for the elderly and effective measures are required to reduce their incidence.

Objective: To investigate the genotypes , allele frequencies and dynamic distribution on resistance associated esterase genes of Culex pipiens complex in Hangzhou., Methods: The PCR-restriction fragment length polymorphism (PCR-RFLP) assay was applied to type the resistance associated esterase genes, and dynamic surveillance on frequencies of the resistance associated esterase gene of natural population of Culex pipiens complex in Hangzhou during 2003-2005, and phenotype of the resistance associated esterase genes were detected by esterase starch gel electrophoresis technique., Results: The PCR-RFLP assay of esterase allele genes for three consecutive years disclosed four esterase genotypes, namely, the world-wide highly active homozygous Est beta 1(1) (50%-54%), homozygous Est beta 2 (29%-34%), heterozygous Est beta 1(1)/beta 2 (5%-10%) and Est beta N (3.13%) of a new homozygous genotype. The research of the resistance associated esterase genes phenotype in natural population of Culex pipiens complex in Hangzhou in 2005 with esterase starch gel electrophoresis technique revealed four major types, namely, Est beta 1(1) (61%), Est alpha 2/beta 2 (12%), Est alpha 8/beta 8 (7%) and sensitive phenotype (29%)., Conclusion: There should be various resistance associated esterase genotypes in natural population of Culex pipiens complex in Hangzhou. During the period of 2003-2005, Est beta 1(1) was the major type; Est alpha 2/beta 2 was the second. Est beta N was a new esterase genotype detected in 2005 only with a mere percentage of 3.13%. As for its resistance to the new insecticide, a follow-up study should be needed. The molecular typing of the amplified esterase gene should be consistent with the resistance associated esterase genes phenotype.