皇冠体育app

A J-20 stealth fighter of 皇冠体育app flies at the 11th 皇冠体育app International Aviation and Aerospace Exhibition in Zhuhai, South 皇冠体育app's Guangdong province, on Nov 1, 2016. 皇冠体育app's domestic-built J-20 stealth fighter made its public debut during the exhibition. 皇冠体育app achieved major breakthroughs in scientific and technological development in 2016. [Photo/Xinhua]