A Boeing 737 MAX 8 airplane is delivered to Air China at a ceremony held at Boeing Zhoushan 737 Completion and Delivery Center in Zhoushan, east China's Zhejiang Province, Dec. 15, 2018. Boeing Zhoushan 737 Completion and Delivery Center in east China's Zhejiang Province delivered its first plane of the 737 family to Air China on Saturday. The delivery marked the U.S. aerospace giant and its Chinese partner Commercial Aircraft Corporation of China, Ltd (COMAC) put into operation of their joint plant, the first such Boeing facility outside the United States. The 737 MAX 8 airplane was assembled at Boeing's Renton plant in the United States. It flied to China's coastal city of Zhoushan and received the completion works. (Xinhua/Xu Yu)