China-based Q&A service Zhihu closed down 11% in its US buying and selling debut on Friday, after elevating $522.5M in an IPO; Zhihu had 75.7M MAUs in This fall 2020, up 33% YoY — – Zhihu falls 11% in U.S. buying and selling debut after $522.5 million IPO — Alibaba, JD.com, Tencent be a part of $250 million personal placement