A medical worker of the Chinese public security frontier defense troop helps Zhaxi Deleg of the Tibetan ethnic group injured in the earthquake to bandage up his leg in Gyegu Town of Yushu County, northwest China's Qinghai Province, April 20, 2010. The quake-jolted area in Qinghai was attacked by a hailstorm Tuesday, which hampered the disaster relief efforts. (Xinhua/Wang Xiaoxue)