Zhao Jianhui, the founder and chairman of Epiworld International, joined the billionaire ranks after shares of his Xiamen-based power chip wafer manufacturer jumped 35% in their Hong Kong trading debut on Monday.

The listing values Epiworld at HK$43.8 billion ($5.6 billion) based on its closing price of HK$103 on Monday. Zhao, 66, is Epiworld’s largest shareholder with a 27% stake, which gives him an estimated net worth of $1.5 billion.

Epiworld raised HK$1.6 billion in the initial public offering. The company disclosed in its prospectus that it will use the bulk of the IPO proceeds to expand production capacity in China over the next five years. Epiworld did not respond to a request for comment regarding Zhao’s billionaire status.

Established in 2011, Epiworld manufactures........

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