A J-31 stealth fighter has its test flight ahead of the 10th China International Aviation and Aerospace Exhibition in Zhuhai, south China's Guangdong Province, Nov. 10, 2014. Some 700 exhibitors from at home and abroad with 130-plus planes will attend the six-day airshow starting on Nov. 11. (Xinhua/Liu Dawei)

在珠海航展现场国产四代战机歼31开始训练飞行。