Martial Law (TV series 1998-2000)

Sammo Law, a top flight cop and hand to hand combat instructor from Shanghai, China comes to Los Angeles to search for a crime boss and a female undercover cop whom his department lost contact with. Once there, his temporary mission is turned into an ongoing exchange position and he is partnered with a pair of cops. As they battle the criminal elements of the city, his skill in martial arts proves to be a big help. - IMDb