Chinese Premier Li Keqiang visits Yang Yujie (center), a 7-year-old boy who was badly injured in the 7.0-magnitude quake at the West China Hospital in Chengdu, Sichuan province April 21, 2013. Yang's mother and elder sister remain missing after their home was ruined in the quake while the boy's father is hurrying home from his workplace in another city. [Provided to chinadaily.com.cn]