A 7.8-magnitude earthquake occurred in Wenchuan, Sichuan. Obvious seismic sensations were felt in Beijing, Shanghai, Tianjin, Hunan, Qingyang of Gansu, Wuhan city, Kunming area, Chengdu, the central area of Xian, Haikou city, Inner Mongolia, Lanzhou of Gansu, and Hefei city. When an earthquake occurs, you must learn to protect yourself.