YIXING CITY ZHONGZHENG CHEMICAL CO.,LTD (formerly Yixing No.4 Chemical Factory) has 400 staff and employees, 75 technicians. She covers 68,000 square metres and owns fixed asserts CNY40 million. She includes: Yixing Petrochemical Auxiliaries Factory, Yixing Zhengrun Chemical Co. Ltd, Yixing City Laboratory of Fine Chemical and she is involved with research, manufacturing and trade.