Zhihu (ZH.US) rose 4% on Thursday, closing at $3.66. The increase follows a series of share repurchases by the company in the Hong Kong market. On February 11, Zhihu spent $119,400 to buy back 99,000 shares at prices between $1.1733 and $1.2433 per share. The previous day, February 10, the company allocated approximately $116,200 to repurchase about 94,600 shares. On February 9, it invested $118,600 to repurchase 99,000 shares, with prices ranging from $1.1667 to $1.2167 per share.