The movie "Insider" is a criminal action film that exposes corruption and unhealthy trends in South Korean society through the experiences of conservative newspaper commentators, members of Congress, committee members of large business, underworld thugs, intelligence criminal police officers, documentary photographers, etc. The role of An Shangjiu played by Li Bingxian in the film was originally a "hunting dog" as a power holder who did all bad things. However, after he became a disabled person, he became a "political hooligan" who fought against power holders in order to avenge himself. Cao Chengyou plays the role of prosecutor Yu Changxun, a sniper for corrupt politicians who cover up crimes if they want to be kicked in the prosecutor's organization. Bai Yunzhi plays Capital Daily commentator Li Qiangxi.