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.