What impressed us most at this week was the earthquake occurred in Yaan Lushan of Sichuan province. On April 20^th, 8:02 in the morning, the 7.0 earthquake happened near Chengdu. Up to 15:00 yesterday, 1.5million people in 13 cities and 69 counties were affected in this disaster. 186 people were killed, 21 were missing and 11393 were injured including 968 seriously. Building collapsed and roads were damaged. People lost their warm house in split second. Up to 18:00 on April 21^st, 1642 times of aftershock were recorded including 4 times of 5.0 or higher magnitude. We cannot stop the happening of disaster, but we can try our best to handle the means of self-rescue to survive through it.