Farmers from China's Hebei Province take medicine for altitude sickness after they arrive in the quake-hit Yushu Tibetan Autonomous Prefecture of northwest China's Qinghai Province, April 19, 2010. They set off on April 15 and purchased 170 quilts, 78 cotton-padded clothes and three tents on their way to the quake-hit area. (Xinhua/Ding Haitao)