鄭則仕
Lai Chun Sing (Kent Cheng) has been in the police force for 30 years. During one investigation, his assistant police dog sacrificed its life to save him. Struck by the death, Sing decided to join the Police Dog Unit. In 25 years, he advanced from a dog caretaker to an instructor and he now plans to use his retirement money to open a dog care center, allowing dog owners to bring their dogs for training and play.