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The International Maritime Organization (IMO) plays a significant role in global marine environmental governance, providing a forum of regulatory oversight for member states. Member states are the main actors of the IMO and exert considerable influence on the process of lawmaking. Among these member states, China is unique due to its multiple identities. There are various factors influencing interests behind China’s multiple identities, which fully engage the country in various shipping and maritime trade activities. This article examines China’s role in the IMO marine environmental regulatory governance. It identifies the impact of China on global ocean governance and indicates the development and reforms in the global governance system. China enacted the China Ocean Agenda 21 for its strategy of ocean development. Thus, China is the object of study in this examination of empirical research that collects submissions from 2001 to 2020 related to marine environmental governance. The findings reveal that the extent to which China participates in such governance has considerably increased, and although the contribution of China’s submissions is still in development, its role in the IMO is no longer merely that of a follower, and the efforts of the country have had a positive influence on the IMO’s marine environmental regulatory governance, including its legal instruments.

Molecular dynamics simulation is one kinds of important methods to research the nanocrystalline materials which is difficult to be studied through experimental characterization. In order to study the effects of Sn content and strain rate on the mechanical properties of nanopolycrystalline Cu–Sn alloy, the tensile simulation of nanopolycrystalline Cu–Sn alloy was carried out by molecular dynamics in the present study. The results demonstrate that the addition of Sn reduces the ductility of Cu–Sn alloy. However, the elastic modulus and tensile strength of Cu–Sn alloy are improved with increasing the Sn content initially, but they will be reduced when the Sn content exceeds 4% and 8%, respectively. Then, strain rate ranges from 1 × 109 s−1 to 5 × 109 s−1 were applied to the Cu–7Sn alloy, the results show that the strain rate influence elastic modulus of nanopolycrystalline Cu–7Sn alloy weakly, but the tensile strength and ductility enhance obviously with increasing the strain rate. Finally, the microstructure evolution of nanopolycrystalline Cu–Sn alloy during the whole tensile process was studied. It is found that the dislocation density in the Cu–Sn alloy reduces with increasing the Sn content. However, high strain rate leads to stacking faults more easily to generate and high dislocation density in the Cu–7Sn alloy.