Users in mainland China are flocking to Clubhouse, a rare space outside the country's firewall where they can speak freely with people from Hong Kong and Taiwan (Michelle Chan/Nikkei Asia)

Michelle Chan / Nikkei Asia: Users in mainland China are flocking to Clubhouse, a rare space outside the country's firewall where they can speak freely with people from Hong Kong and Taiwan  —  Audio-based social-media platform becomes free-speech haven for mainland users  —  The Clubhouse app had two million users globally as of Jan. 24.
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