Shao Zi Heng

On September 29, 2024, Zi Heng 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 1st overall, thus making him the center of POLARIX. On October 9, Zi Heng announced he would be making his solo debut on October 10, 2024 with his digital single "Reckless".

On May 28, 2025, Zi Heng made his debut as a member of POLARIX with the EP Freefall.