Xu Shi Huan

On August 18, 2023, he was introduced as a contestant on MBC M's boy group survival show Fan Pick. He left the show due to personal reasons. On September 29, 2024, Shihuan was introduced as a contestant on the Chinese-South Korean survival show Starlight Boys.

During the show's finale, he was revealed to have ranked 3rd overall, thus making him a member of POLARIX. On May 28, 2025, Shihuan made his debut as a member of POLARIX with the EP Freefall.