Chinese 5th generation fighter J-20 revealed

2013年1月11日,是中国首款四代隐形战斗机歼-20成功首飞两周年的纪念日。

So the maiden flight already took place in 2011 January.

Chinas first known stealth aircraft just emerged from a secret development program and was undergoing high-speed taxi tests late last week at Chengdu Aircraft Design Institutes airfield. Said to be designated J-20, it is larger than most observers expectedpointing to long range and heavy weapon loads.