Introduction to earthquake ruins: The factory was built in 1959. The preserved remains are a three-span factory building running from north to south, with a construction area of 9072 square meters. During the earthquake, the factory was at the macroepicenter, with an intensity of 11 degrees. Except for some of the middle columns of the three-span factory that were twisted and tilted, all the surrounding wall columns collapsed and the roof trusses fell to the ground.