At least 116 people have been killed and another 220 injured following an earthquake on Monday night in north-west China, state media report.
Chinese authorities said the 6.2 magnitude quake struck Gansu province around midnight (16:00 GMT) and also affected neighbouring Qinghai.
Thousands of rescuers are braving freezing conditions to try and help people in the high-altitude area.
A second quake struck neighbouring Xinjiang hours later on Tuesday.
The damage from that 5.5 magnitude strike was not immediately clear.
Chinese President Xi Jinping has ordered full rescue efforts to Gansu, one of China's poorest regions. Jishishan county appears to be the worst-hit area.
Chinese President Xi Jinping has ordered full rescue efforts to Gansu, one of China's poorest regions. Jishishan county appears to be the worst-hit area.