Abstract The current international law system is undergoing profound reforms, which reflects significant changes of the global landscape. With continuously improving composite national strength and the ever-growing international influence, China has entered a new era. In the process of the evolution of the current international law system, China plays the role as the observer of the existing international law system, the advocator of the international law philosophy of fairness and justice, and the constructor of the future international law system. China makes decisive contributions to promoting the development of the international law system to safeguard the common interest of the community with a shared future for mankind. Therefore, China should strengthen capacity construction in aspects of learning, influence and leadership in the new era, and increase its contributions to the construction of the future international law system at domestic, regional and international levels.