The doctrine of building “a human community with a shared future” (HCSF) is a Chinese diplomatic strategy in the new era moving closer to the center of global affairs. It includes enriched ideas about international law and the essential elements of institutionalization. The emergence and development of modern international law have revealed the critical importance of the ideas about international law as guidance for institutions. It is necessary and possible to institutionalize the HCSF by setting its ideas as principles of international law. The principles of international law for the HCSF are those of durable peace, universal security, common prosperity, coexistence of different civilizations, and sustainable development. The new five principles of the HCSF are integrated with the existing general principles of international law and Chinese proposals for the new era, which is not only the development of Chinese-initiated Five Principles of Peaceful Coexistence but also a new contribution to the contemporary international law. It will be the new guidance to advance the profound changes of international relations unseen in a century for the common interest of mankind.