S ze Man Bok is a self-made Chinese billionaire who is the founder and chairman of the Hengan International Group, one of China's largest and most successful manufacturers of personal hygiene products. He founded the company in the 1980s in his native Fujian province, a region that has become a major hub for private enterprise in China. He has since built Hengan into a dominant domestic player with a portfolio of household brands.

Hengan is the largest producer of sanitary napkins and baby diapers in China, with its iconic brands being a staple in households across the country. The company also has a major business in household tissue paper and other personal care products. Sze took the company public on the Hong Kong Stock Exchange, and his family's large controlling stake is the source of their multi-billion dollar fortune. He is a prominent and influential figure in the Chinese consumer goods industry.