Gunnar Wiegand (1st R), Managing Director for Asia and the Pacific at the European External Action Service, speaks during a seminar held by the Brussels-based think tank Friends of Europe in Brussels, Belgium, March 20, 2019. China and the European Union (EU) both know how to control differences and resolve problems in between, and thus develop their relations healthily, said Ambassador Zhang Ming, head of the Chinese Mission to the EU on Wednesday, on eve of the EU summit which will talk about issues including contacts with China. (Xinhua/Zhang Cheng)