Qudans first began playing Tekken from the first game in the series at a young age casually. It was not until Tekken Tag Tournament that he began to play seriously , quickly making a name for himself in the South Korean Tekken scene and became an EVO Champion for the game in 2005, defeating Ryan Hart in the finals . Qudans kept playing until 2007, retiring due to hand fatigue experienced from excessive exercising which even forced him to temporarily switch to using a Joypad for Electric Cancel 6  (he won the Tekken 5 and Tekken Tag Tournament events regardless). After this Qudans went on a five year hiatus from competitive Tekken, enlisting in the Army, going to University and getting a part-time job.
After his hiatus Qudans made his return to Tekken after being convinced by fellow player Ji3moon Ace to start playing Tekken Tag Tournament 2 and was motivated as well after watching Knee playing for numerous tournaments. His rise to stardom once again started with Tekken 7 however winning multiple tournaments such as the first season of AfreecaTV TEKKEN League and the SEA Major with the latter victory ensuring him a place at the first Tekken World Tour Finals where he emphatically won the event after a 10 year absence from North American tournaments. Shortly after this he was sponsored by ROX Dragons for the next TWT circuit but later signed with UYU in early 2018.
He would go on to make the Tour Finals once again after numerous Top-8 finishes in the regular circuit, eventually finishing 2nd place to Rangchu. A few months after this Qudans won the most prestigious Tekken 7 tournament of all time at the True Gaming Invitational 2019, winning $60,000 after beating Chanel in a Bracket-Reset to win the tournament.
|2019-03-29||1st||Tier 1||True Gaming Invitational 2019||3 : 0
3 : 2
|2018-12-02||2nd||Tier 1||Tekken World Tour Finals 2018||1 : 3
1 : 3
|2018-08-05||2nd||Tier 1||Evolution Championship Series 2018||3 : 1
0 : 3
|2018-07-01||2nd||Tier 1||Community Effort Orlando 2018||0 : 3
2 : 3
|2018-06-10||1st||Tier 1||Fighting Games Challenge 2018||0 : 3
3 : 1
|2017-11-19||1st||Tier 1||WEGL 2017 Super Fight Invitational||6 : 0||AK||$9,110|
|2017-11-12||1st||Tier 1||Tekken World Tour Finals 2017||3 : 1
3 : 1
|2017-10-15||1st||Tier 1||Tekken World Tour 2017 Asia-Pacific Regionals @ South East Asia Major 2017||3 : 2
3 : 2
|2017-10-08||2nd||Tier 1||TWFighter Major 2017||1 : 3
3 : 0
|2017-06-17||1st||Tier 2||AfreecaTV TEKKEN League 2017 : Season 1||7 : 6||LowHigh||$2,624.01|
|About achievementsComplete Results in any Tournament|
- His nickname originated from typing in his first name in a keyboard in English mode, which instead of typing "Byeong Mun" actually typed out "Qudans" instead.
- 2019-07-25 | by theScore esports
- 2018-05-12 | by Core-A Gaming