Yuchang Building is also known as the East and West Sloping Building. The building is large and the pillars on the floor are tilted to one side, but the building will not collapse, which is a miracle in the history of architecture. Some pillars lean left and right. Shortly after the construction of this earth building, the wooden pillars in the corridors of the building began to tilt from left to right. The maximum tilt was 15 degrees, which looked shaky, but withstand hundreds of years of wind and rain erosion and countless earthquakes. So it is called the east to the west, the building is a 5-story structure, and there are still people living. Very simple life, the scenery outside the building is superb, the river flowing through, the whole building and the surrounding green mountains and green waters are very coordinated.