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The connectivity construction of the Maritime Silk Road in the 21st century has created more opportunities for trade and further promoted maritime trade among countries along the route. As an important hub of the maritime connectivity network, the construction of port infrastructure connectivity is of great significance. Taking the port infrastructure of 30 countries along the 21st-century Maritime Silk Road as an example, this paper analyzes the current state of port connectivity construction in China. It identifies that the port infrastructure connectivity between China and Southeast Asia is the most developed and establishes an indicator system for evaluating the potential for port infrastructure connectivity. Based on the principal component analysis (PCA), it is found that Germany, Singapore, the United Kingdom, the Netherlands, and other countries have relatively high port infrastructure connectivity potential. Finally, suggestions are put forward: China should strengthen the connectivity construction of port infrastructure with Europe and prioritize policy exchanges with Germany to align port development strategies and enhance bilateral maritime trade by establishing complementary trade chains.

The decontaminant activated by MoO42- (MoO42--H2O2) suitable for subzero environment shows strong oxidizing ability and weak nucleophilicity due to its acid. In this paper, in order to improve nucleophilicity and retain oxidation of MoO42--H2O2 as far as possible, NH3 and NaOH were used as alkaline modifiers, and PhSMe was used as a simulant of HD to study the oxidation rate and products of sulfides by alkaline-modified MoO42--H2O2 below zero. Results showed that the reaction rate constants decreased with the increase of pH in both NH3 and NaOH modified MoO42--H2O2 at -20°C, and the relative ratio of sulfone to sulfoxide increased especially at pH>9. The reaction activation energy Ea of PhSMe oxidation in the alkaline-modified MoO42--H2O2 decontaminants was lower than that in the MoO42--H2O2 decontaminant, which indicated that the sensitivity of the oxidation reaction rate to temperature in MoO42--H2O2 was reduced after modification.