In his prime he boasted athleticism, the ability to dunk and a mid-range jump shot which was rare for players of his height in domestic basketball at that time, earning him the nicknames "Airborne" and "Air Hee-chul".

He and his teammates, as well as their counterparts from traditional athletic rivals Yonsei University, enjoyed a level of popularity similar to that of idol singers and A-list actors/actresses due to their skills and good looks.

Together with Hyun and Yonsei University's Lee Sang-min, Moon Kyung-eun and Woo Ji-won among others, they were collectively dubbed "Oppa Troupe" (오빠부대) by the media.

Unlike many of his counterparts, he was assigned to be a public service worker instead of the Korea Armed Forces Athletic Corps (Sangmu basketball team).

Tongyang were unable to find suitable replacements as he and Kim had enlisted at the same time as several other key players and the mid-table team finished the 1998–99 season at the bottom of the league table.

He was part of the squad at the 1996 Atlanta Olympics and a key member of the 1997 ABC Championship-winning team, being named tournament MVP.

[20][21] Chun was recalled to the squad for the 2002 Asian Games, where he played as a forward due to Seo Jang-hoon and rookie Kim Joo-sung being preferred as the main centers.

The Koreans managed to climb back from behind to win 102–100 in overtime; it was their first gold in men's basketball at the Asian Games in two decades.

After the 2020-21 season ended, the club announced that Moon would be moving to technical advisor role and Chun became the new head coach.