【明報專訊】During the global coronavirus lockdowns, TikTok's popularity rose sharply. Research shows that 315 million people downloaded the app in the first three months of 2020. Yet concerns over its data and privacy policies have let TikTok pull out of Hong Kong and vanish from Google Play and Apple's iOS App Store in the city. It is even blocking users in Hong Kong who have already installed the app. ByteDance, TikTok's parent company offers an equivalent product called Douyin, which is being used by users in Hong Kong. Apparently, Douyin/TikTok, the popular app that attracts users to create and share short lip-syncing and dancing videos of between 3 and 60 seconds, has been fashionably accepted in Hong Kong, Taiwan, and on the mainland.