At Beijing's Shijingshan K9 training base, a group of elite police dogs are honing their extraordinary skills. From sniffing out hidden drugs and explosives to locating missing persons, these four-legged officers are far more than pets. Behind every move lies their unwavering loyalty, courage and commitment to protect. (Produced by Zhang Xi, Ni Tao, Zhao Zhe, Mu Yihan, Sun Zhetao)