"Loyal Guards" is a TV series about national security that was first broadcast in 2018 and produced by Beijing Changjiang Culture Co., Ltd., Yili Changjiang Rongyihesheng Film and Television Media Co., Ltd., and Shanghai Guoting Culture and Art Development Co., Ltd. The series is based on the representative public security national security cadres and soldiers before and after the founding of New China, and portrays a group of national security heroes such as Gao Cheng, Yan Jun, Liu Zhong, Dong Qi, Qi Wenlei, and Zhang Lan. From the early days of liberation, the elimination of the murderers who plotted to assassinate the party and government leaders of the country to the witty resolution of the "shelling of Tiananmen" crisis before the first anniversary of the founding of the People's Republic of China; from the repeated assassination plans of the latent enemy agents in the old forces to the tenacious pursuit and killing of the enemy's gold medal killer; from cracking the conspiracy of the reactionary forces to blow up the "Mao Zedong Special Train" to digging out the enemy's intelligence network that threatens the heart of the Republic; from obtaining key intelligence at the forefront of the battle against the enemy after the founding of the People's Republic of China to cutting off the last link of the flow of enemy agents. With great wisdom and courage, they faced the challenge with a smile, fought wits and courage with the secret agents headed by Mao Renfeng, the director of the KMT's Secret Service, and turned danger into safety again and again. They made indelible contributions to the stability of the new regime of the Republic with their uncomplaining ideals and beliefs.