(Dec 25): Chinese question-and-answer (Q&A) website Zhihu Inc, which went public in the US in March this year, is said to be considering another initial public offering (IPO) in Hong Kong, local media the Paper reported on Saturday (Dec 25). The Beijing-based company plans to submit documents for its share offerings in Hong Kong in January, the Paper reported, citing unidentified people. Zhihu shares have tumbled 44% following the company’s IPO on the New York Stock Exchange in late March. Beijing is tightening scrutiny of domestic firms’ overseas share sales amid concern that these listings could pose national security threats if companies held sensitive data. China’s security watchdog on Friday said all Chinese businesses planning IPOs and additional share sales abroad would have to seek the approval of the China Securities Regulatory Commission.