C heng Zhenghui is a Chinese billionaire whose fortune is derived from his family's stake in Shanghai RAAS Blood Products, a leading Chinese company in the blood plasma industry. Blood products, such as albumin and immunoglobulin, are essential for treating a variety of medical conditions, including immune disorders and shock. The company is a key player in this critical part of the healthcare sector.

The company was founded by a Vietnamese-American, but the Cheng family, along with other investors, are now the main shareholders. The company has grown by expanding its network of plasma collection centers and its manufacturing capacity. The demand for blood products in China is immense and growing, and as a leader in this highly regulated industry, Shanghai RAAS has achieved a significant valuation on the Shenzhen Stock Exchange, which is the source of the family's wealth.