Photo taken on Oct. 14, 2017 shows an ARJ21-700 plane that performs a test flight (L) at an airport in Dongying, east China's Shandong Province. The Chinese-developed regional jetliner, which has the BeiDou navigation system installed, has successfully completed a test flight, the Commercial Aircraft Corporation of China (COMAC) said Saturday. (Xinhua/Ding Ting)
