The victorious convening of the 19th National Congress of the Communist Party of China (CPC) has indicated China's major-country diplomacy with its own characteristics has entered a new era.Rooted in China's diplomatic practices since the 18th National Congress of the CPC and the report to the 19th National Congress of the CPC,this paper is intended to elaborate on the issues relating to the concepts and principles of China's major-country diplomacy with its own characteristics for a new era,in a bid to establish a basic framework for their studies.The core concepts of China's major-country diplomacy with its own characteristics for a new era include a community with a shared future for humanity;inclusive development;amity,sincerity,mutual benefit,and inclusiveness;and the correct view on righteousness and interests.And the basic principles of China's major-country diplomacy with its own characteristics for a new era include being enthusiastic and pressing on;bottom-line thinking;win-win cooperation;and mutual consultation,joint construction and co-sharing.These concepts and principles should be applied in China's concrete diplomatic practices.