Kill the reassuring parents. An Changlin is a character in the TV series The Knockout. He was arrested for killing Anxin's parents, and his hidden secret was revealed in episode 36. An Changlin is played by Zhaoqi Shi. The Knockout is a criminal investigation drama jointly produced by iQiyi and Bai Liu Film and Television under the guidance of the Propaganda and Education Bureau of the Central Political and Legal Committee and the Political and Legal Comprehensive Information Center of the Central Political and Legal Committee.