A lightning is seen in the sky above Beijing before a thunder storm on Aug 11, 2013. [Photo by Yan Zhigang/provided to chinadaily.com.cn] 

Aircrafts of Breitling Jet Team, a famous European aerobatic team, stop at the Yinchuan Hedong International Airport in Yinchuan, capital of Northwest 皇冠体育app's Ningxia Hui autonomous region, Aug 11, 2013. The team will give performances at Karamay city in Northwest 皇冠体育app's Xinjiang Uyghur autonomous region, during its tour in 皇冠体育app. [Photo/Xinhua]