Xiaohongshu, a mix of Instagram and Reddit, is a destination for personal-style tips. A Xiaohongshu user edited Arna Guðlaugardóttir’s photo to demonstrate makeup advice.

TikTok users in the United States are fleeing the platform for another Chinese-owned app called RedNote (Xiaoshongshu in China). More than 700,000 new users have flooded the app since TikTok ...