![China\'s domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport\'s 4th runway. (Photo: China News Service/Yin Liqin)](http://www.ecns.cn/hd/2018/12/28/c7278141da1143a6bbeef8cc8de35143.jpg)
China's domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport's 4th runway. (Photo: China News Service/Yin Liqin)
![China\'s domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport\'s 4th runway. (Photo: China News Service/Yin Liqin)](http://www.ecns.cn/hd/2018/12/28/e39c84483a6c453dab2c9d330420f5ec.jpg)
China's domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport's 4th runway. (Photo: China News Service/Yin Liqin)
![China\'s domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport\'s 4th runway. (Photo: China News Service/Yin Liqin)](http://www.ecns.cn/hd/2018/12/28/03dc03bfbc204faf823ea837ebcf15d4.jpg)
China's domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport's 4th runway. (Photo: China News Service/Yin Liqin)
![China\'s domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport\'s 4th runway. (Photo: China News Service/Yin Liqin)](http://www.ecns.cn/hd/2018/12/28/e530a888b96640d88882b31fe5e0235a.jpg)
China's domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport's 4th runway. (Photo: China News Service/Yin Liqin)
![China\'s domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport\'s 4th runway. (Photo: China News Service/Yin Liqin)](http://www.ecns.cn/hd/2018/12/28/0e380cc386764f93ae522e20616c6bb6.jpg)
China's domestically developed C919 passenger jet is seen during a test flight at Pudong International Airport in Shanghai, Dec. 28, 2018. The third C919 plane, developed by the state-owned Commercial Aircraft Corp. of China (COMAC), took a test flight at the busy airport's 4th runway. (Photo: China News Service/Yin Liqin)