Rescuers work in a sustaining operation of searching for survivors among debris in quake-hit Yushu County, northwest China's Qinghai Province, April 16, 2010. A dragnet serach for survivors is implemented throughly at all rescuing sites as the "golden 72 hours", a key surviving chance for buried people comes on Friday. Qinghai's Tibetan Autonomous Prefecture of Yushu was jolted by a 7.1-magnitude earthquake Wednesday morning, which has left at least 1,144 people dead. [Xiao Honghuan/Xinhua]