Gelonghui, Feb. 8: Zhejiang Zhongcheng (002522.SZ) said on the investor interactive platform that the main raw materials of the POF heat shrink film products produced by the company are polyethylene and polypropylene, so they are not degradable. POF heat shrink film is mainly used in the outer packaging of all kinds of food, beverages, daily necessities, cosmetics, educational supplies, books, audio and video products, pharmaceutical products, electronic products, handicrafts, communication equipment, hardware tools, etc., as well as the collective packaging of various light and small products. In the Singapore region, customers purchase the company's products.