http://en.people.cn/90001/90776/90786/7354617.html
The J-20 prototype made its 18-minute debut flight in Chengdu on January 11, when US Defense Secretary Robert Gates visited Beijing
1月11日,當美國國防部長羅伯特蓋茨訪問北京時,J-20原型機在成都進行了18分鍾的首次飛行
https://www.nytimes.com/2011/01/12/world/asia/12fighter.html
https://www.flyingpenguin.com/?p=9312
首飛視屏:2011-1-11