![World's largest solar-powered plane heads for Nanjing(2/7)](http://www.ecns.cn/hd/2015/04/21/7f240163443d4a0eb87f81b67b11800f.jpg)
Ground crew members check Solar Impulse 2 in a hangar of Jiangbei International Airport in Chongqing Municipality, southwest China, April 21, 2015. Solar Impulse 2, the world's largest solar-powered plane, left Chongqing Tuesday morning and headed for Nanjing, capital of east China's Jiangsu Province. (Photo: Xinhua/Tang Yi)