JACK'S BACK: CHINESE E-TYCOON ENDS SILENCE WITH ONLINE VIDEO

China’s highest-profile entrepreneur, Jack Ma, appeared this week in an online video, ending a 2 1/2-month absence from public view that prompted speculation about the future of the e-commerce billionaire and his Alibaba Group.

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In the 50-second video, Ma congratulated teachers supported by his foundation and made no mention of his disappearance or official efforts to tighten control over Alibaba and other internet companies over the past six months. The video appeared on Chinese business news and other websites.

The normally voluble Ma disappeared from public view after he irked regulators by criticizing them in an Oct. 24 speech at a Shanghai conference. Days later, regulators suspended the planned multibillion-dollar stock market debut of Ant Group, a financial platform that grew out of Alibaba’s payments service, Alipay.

That prompted speculation online about whether the 56-year-old Ma, China’s biggest global business celebrity and a symbol of its tech boom, had been detained or might face legal trouble. Alibaba and the government haven’t responded to questions about him.