W ang Xicheng is a Chinese billionaire whose wealth is derived from his 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. His brother, Ruan Shuiliang, is the chairman and public face of the company.

While his brother is the longtime leader of the company, his 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. His ownership stake in the family-controlled, publicly traded business is the source of his considerable fortune.