Full coverage: China Tiangong-2 Space Lab Launch

Photo taken on Nov. 1, 2016 shows a screen broadcasting Chinese astronaut Chen Dong sends his best wishes from the space lab Tiangong-2 to the on-going 11th China International Aviation and Aerospace Exhibition in Zhuhai, south China's Guangdong Province. The exhibition runs from Tuesday to Sunday in Zhuhai. (Xinhua/Liang Xu)

Photo taken on Nov. 1, 2016 shows a screen broadcasting Chinese astronaut Jing Haipeng sends his best wishes from the space lab Tiangong-2 to the on-going11th China International Aviation and Aerospace Exhibition in Zhuhai, south China's Guangdong Province. The exhibition runs fromTuesday to Sunday in Zhuhai. (Xinhua/Liang Xu)