With a TikTok ban set to go into effect in the U.S. on Sunday, social media users in the U.S. are migrating to Xiaohongshu, also known as ‘REDnote.’

TikTok refugees flocked to Chinese platform Xiaohongshu on Monday, where users greeted them with offers of Mandarin lessons and jokes about spying.

As TikTok moves closer to being kicked out of the U.S., two Chinese apps — Xiaohongshu and Lemon8, which shares parent company ByteDance with TikTok — have blitzed to the top of the Apple App Store. As of Tuesday morning,