Luxembourg's Prime Minister Xavier Bettel (1st L), who is paying an official visit to China, visits the Mutianyu section of the Great Wall in Beijing, capital of China, June 11, 2017. (Xinhua/Jin Liangkuai)
Luxembourg's Prime Minister Xavier Bettel (1st L), who is paying an official visit to China, visits the Mutianyu section of the Great Wall in Beijing, capital of China, June 11, 2017. (Xinhua/Jin Liangkuai)