Which plastic factory was the largest before liberation?

Shanghai chemical plant. Plastic factory usually refers to a factory (company) that produces or manages plastic raw materials and plastic (plastic) products, that is, a factory that processes and shapes plastic products with plastic raw materials. According to relevant data, the plastic factory of Shanghai Chemical Plant was the largest before liberation. Shanghai Chemical Plant is located at Yangshupu Road 1578. Founded in 1924, it was originally a sugar enterprise in Shanghai. 1946 became the Shanghai branch of the Central Chemical Plant of the National Government. After liberation, it was renamed Shanghai Chemical Plant.