Yoon Jong-bin's Chung-Ang University graduation thesis film was The Unforgiven, which portrayed masculine codes in the Korean military with honesty and sensitivity.
[3][2] In his third film Nameless Gangster: Rules of the Time, Yoon tackled corruption among prosecutors and customs officers and their collusion with the mob in 1980–1990s Busan.
[4][5] Unlike his first two films, Yoon's gangster saga was popular at the box office and became one of the biggest domestic hits of 2012.
[6][7] Yoon further explored the themes of injustice and violence in his fourth film Kundo: Age of the Rampant, a tale of 19th-century Joseon bandits who waged war against the nobility and corrupt government officials.
"[10] Yoon has worked with close friend and fellow Chung-Ang University alumnus Ha Jung-woo in all four of his features.