[Accident Report] PLA S-70C accidents in China

In the Chinese (China) news site “AirForceWorld.COM”, an article about the PLA S-70C at
http://jiatelin.jschina.com.cn/pla/s70.htm
mentioned:

On 16 June 1991, a PLA S-70C Black Hawk crashed in Xi Zhuang autonomous region.
Its 12 crew members were martyred, including a Cheng Du Military District deputy commander.

In the Chinese (China) news site Sina News, an article dated 12 May 2003 at
http://jczs.sina.com.cn/2003-05-12/125955.html
mentioned:

On 8 October 1987, a PLA S-70C crashed in Qing Hai Province.
It broke into three pieces, martyred three soldiers, and wounded 15 soldiers.
Investigators found a fracture on the tail rotor, not detected by the manufacturer. It allowed metal fatigue to cause the tail rotor to fell off, and the chopper to crash.