Zhuhai Langrui Medical Devices Co. is a subsidiary of Jiuqiang Bio?

No. According to the official website of Beijing Jiuqiang Biotechnology Co., Ltd, the wholly-owned subsidiary of Jiuqiang Biotechnology is Fuzhou Maixin Biotechnology Development Co. Ltd. is a biochemical diagnostic reagents ("Kingsol" brand reagents) research and development, production and sales of high-growth enterprises as the main business, with a series of products with the basic synchronization of international development.