Shanghai-based AI startup MiniMax's CEO Yan Junjie (R) and Co-founder and COO Yun Yeyi (L) attended the firm's listing ceremony at the Hong Kong stock exchange, after which its shares soared

Shanghai-based AI startup MiniMax's CEO Yan Junjie (R) and Co-founder and COO Yun Yeyi (L) attended the firm's listing ceremony at the Hong Kong stock exchange, after which its shares soared

Shares in Chinese AI startup MiniMax soared 109 percent as it went public in Hong Kong on Friday, raising US$619 million in a sign that strong investor demand is rewarding the country's rapidly developing sector.

Rival firm Zhipu AI also saw gains, jumping 20.6 percent on its second trading day after its own US$558 million initial public offering.

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