Duolingo’s stock rose nearly 7% on Thursday amid the rising popularity of Xiaohongshu, China’s Instagram-like social media platform.

The company reported a 216% year-over-year increase in Mandarin learners, significantly more than the 40% growth in Spanish learners.

Duolingo offers courses in 42 languages and saw its shares increase by 43% last year, exceeding the Nasdaq’s 29% gain.