Tianjin Biptech, a member of Charlson International Co., Ltd. Charlson was established in Hong Kong in 1994. It is dedicated to the sale of tumor equipment and is the general agent of argon-helium knife equipment in China. Argon and helium knives have become mainstream equipment for oncology and interventional departments in Chinese hospitals. Its main businesses include: Investment, financing, medical device import, and sales and distribution management of medical devices in the Chinese market. For more than two decades, the company has implemented a sound marketing and sales strategy.