On April 26, 1990, at 18:00 hours a severe earthquake of magnitude 6.9 quickly devastated most of the offices and dormitory buildings of the No.13 Reform-through-Labour Detachment in Qinhai.

• 1990年4月26日18时，6.；9级强烈地震将青海省第十三劳改支队的建筑物瞬间震为废墟。