Chinese Premier Li Keqiang (C, back), European Council President Donald Tusk (L, back) and European Commission President Jean-Claude Juncker (R, back) witness the signing of a series of documents in the areas of investment, environment protection, circular economy, a blue partnership for the oceans and customs after the 20th China-EU leaders' meeting in Beijing, capital of China, July 16, 2018. Li, Tusk, and Juncker co-chaired the meeting at the Great Hall of the People in Beijing. [Photo/Xinhua]