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This study adopted the revised Self-assessment of Family Dynamics (SSFD), the Centre for Evaluation of Streaming Depression (CES-D), and the Chinese version of the Interpersonal Reactivity Indicator (IRI-C) by Zeng Weinan and others to investigate the family dynamics, depressive status, and empathy of college students in Sichuan, Chongqing, and Guizhou. The results showed that: (1) Male students’ cognitive empathy scores were significantly lower than female students; (2) The overall depression score of college students in Chongqing municipality was significantly lower than that of college students in Sichuan and Guizhou provinces; (3) Higher vocational college students’ depression scores were significantly lower than undergraduate college students; (4) The overall depression scores of college students from rural areas were significantly higher than those of college students from urban areas; (5) The only child had significantly lower depression scores than the non-only child, and significantly higher scores on all dimensions of systemic family dynamics than the non-only child; (6) Depression had a highly significant correlation with all dimensions of family dynamics traits, and depression was highly significantly associated with cognitive empathy; (7) Cognitive empathy partially mediated the relationship between illness conceptions, systemic logic, and depression, with the proportion of indirect effect accounting for the total effect of 9.18% and 2.64% respectively.

Medical ethics is a quality that should be possessed by healthcare workers. There is an urgent need for the development of medical and health services, which carries the people’s aspiration for a better life. We should vigorously promote the construction of medical ethics, in which the author believes that “nourishing” is the cornerstone and “guidance” is the core. In this paper, we discuss the construction of medical ethics from the two dimensions of how medical and health institutions can make good use of “nourishing” and “guidance,” and put forward corresponding countermeasures from the current status quo of medical ethics. Our aim is to develop and strengthen the medical and health service team in terms of quality, quantity, ability, and moral integrity, thereby promoting the construction of the Healthy China Initiatives.

Positive psychology is capable of not only meeting the developing requirements of humans, but also establishing effective scientific virtues. Under the impact of positive psychology, colleges and universities have exerted certain positive effects and social values in conducting mental health education for college students, thereby optimizing the overall mode of mental health education and realizing its high efficacy and scientificization. This essay provides a comprehensive analysis of the significance of mental health education to the development of college students, adopts a positive psychology stance, and examines relevant research strategies in an effort to enhance the mental health of college students.

This research explores the impact of popularizing electric vehicles (EVs) on China's urban air pollution or contagion. With the rapid growth of the transportation industry and the increasing concern about air pollution, the Chinese administration has been promoting the use of EVs to mitigate the adverse effects of traditional gasoline-powered vehicles on the environment. Using empirical data collected from various cities in China, this study exploits a difference-in-differences approach to analyze the causal connection between the EV implementation and urban air quality. According to the findings, the increase in EV usage significantly and positively impacts reducing the concentration of air emissions such as PM2.5 and SO2. Moreover, the study also finds that the magnitude of the effect varies across different types of cities with varying levels of economic development and air pollution. This research provides valuable insights into the effectiveness of promoting EVs in reducing urban air pollution in China. It has important implications for policymakers and stakeholders in other countries.

In the development process of a certain CHINA VI proprietary brand car model, there exists the problem of intermittent “dada” sound in the cockpit during idling. After investigation, it’s determined that the air pulse noise generated when the canister purge solenoid valve is working, it is transmitted to the car panels through the pipeline, and then to the cockpit, which would cause a “dada” sound. By adding expansion chamber in the desorption pipe and designing part of the pipeline which fixed in the clamp as rubber pipe, the intensity of air pulse can be effectively reduced and the transmission path of air pulse vibration can be blocked. Through objective testing and subjective evaluation, the scheme can greatly reduce the idle noise of the cockpit, thus improving the NVH performance of the vehicle and bringing comfortable riding environment to the passengers.

Based on the interpretation of GB 18352.6-2016 and combined with the author's actual development experience, the key design points and solutions of the three key problems of fuel system that meet China 6 emission regulations are described, Technical route selection of evaporative emission, definition of technical route of fuel tank and control strategy of tank pressure, evaporative emission control, etc..