The Shizai pit next to Jiufen Ershan is a blasting point of 921 earthquake energy. The collapse area is as high as 180 hectares, causing serious collapse and mountain walks. A large number of earth and stone in the square block two valleys, and the Chelongpu fault in central Taiwan is broken. After the big earthquake, the building with the remnant wall is broken. A disaster memorial was set up in Jiufen Ershan to let the people recognize the violence of the earthquake.