W u Zhongyi is a Chinese billionaire who is the chairman of Zhejiang Shuangjian Group, but his vast fortune is derived from his family's controlling stake in Zetron Technology. Zetron is a major domestic manufacturer of electronic components, with a particular focus on capacitors, which are fundamental components used in a wide range of electronic circuits.

The company's growth has been fueled by the massive expansion of the electronics manufacturing industry in China. Zetron's components are used in everything from consumer electronics to industrial equipment. The family's controlling stake in the publicly traded company, which is listed on the Shenzhen Stock Exchange, is the source of their considerable fortune. Wu's career is an example of the wealth that has been created by entrepreneurs who have built successful businesses supplying the vast Chinese electronics supply chain.