CHINA-BASED Q&A SERVICE ZHIHU CLOSED DOWN 11% IN ITS US TRADING DEBUT ON FRIDAY, AFTER RAISING $522.5M IN AN IPO; ZHIHU HAD 75.7M MAUS IN Q4 2020, UP 33% YOY (JULIA FIORETTI/BLOOMBERG)

--FILE--A netizen browses the mobile app of China's largest question-and-answer platform Zhihu on his smartphone in Ji'nan city, east China's Shandong province, 12 April 2018. China's largest question-and-answer platform Zhihu completed a $434 million funding round from investors including search engine giant Baidu Inc. and leading short video site Beijing Kuaishou Technology, the company said Monday (12 August 2019). (Imaginechina via AP Images)