正丹股份：与持股5%以上股东华杏投资（镇江）有限公司共同投资在马来西亚建设生产基地

Core Viewpoint - The company, Zhengdan Co., announced a joint investment with its major shareholder, Huaxing Investment (Zhenjiang) Co., Ltd., to establish a production base in Malaysia [2] Group 1 - The investment involves collaboration with a shareholder holding more than 5% of the company's shares [2] - The specific details of the investment project have been disclosed in the company's related announcements [2]