W ang Weixiu is a Chinese billionaire whose wealth is derived from her family's stake in the chemical company Zhejiang Longsheng Group. The company is a global leader in the production of textile dyes, particularly disperse dyes, which are used to color polyester and other synthetic fibers. Her son, Ruan Shuiliang, is the chairman and public face of the company.

While her son is the longtime leader of the company, her fortune is intrinsically linked to its success. The family has built a powerful, vertically integrated chemical enterprise that benefits from the massive scale of the global textile industry. The company has also diversified its operations into other specialty chemicals and has a significant real estate arm. Her ownership stake in the family-controlled, publicly traded business is the source of her considerable fortune.