Medical personnel prepare to leave Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, for the quake area, April 15, 2010. A total of 105 medical personnel and 15 ambulances were sent from Urumqi to quake-hit Yushu County, northwest China's Qinghai Province, on Thursday. The death toll of China's Qinghai 7.1-magnitude earthquake rose to 617 as of Thursday.