Lee Byung-hun was 23 in Sunset on the Neon Lights when he played an uncredited character.
That was over 29 years ago in 1995.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 53, and has starred in 44 movies in total, 40 of those since Sunset on the Neon Lights was released.
In Sunset on the Neon Lights, I think Lee Byung-hun looks: