5. Zhao Tao, $4.6B
Zhao Tao (51) is the chairman of Shandong Buchang Pharmaceuticals, which engages in the research and development, production, and sale of traditional Chinese medicine. The company is headquartered in Xi’an, China.
Founded in 1993 by Zhao Tao’s father, he owns more than 57% of the company alongside his wife.
The company went public on the Shanghai Exchange last year, and was reported to have earned nearly $1.1 billion in revenue in 2015. It has over 7,400 employees worldwide.