Read more about Wah Sing Ku at: Wikipedia

Official Site: Warner Bros.

Lethal Weapon 4 is a 1998 American buddy cop martial arts action thriller film directed by Richard Donner, starring Mel Gibson, Danny Glover, Joe Pesci, Rene Russo, Chris Rock and Jet Li. It is the third sequel in the Lethal Weapon series of films. This was Jet Li's first American film debut as Wah Sing Ku.

Lorna Cole is pregnant with LAPD sergeant Martin Riggs' baby; they are not married, but both are thinking about it. Police sergeant Roger Murtaugh's daughter Rianne is also pregnant, and Riggs later learns from Lorna that Rianne has secretly married Lee Butters (Chris Rock), a young detective who works at the same precinct as Murtaugh and Riggs – secretly because Roger had made it clear that his daughter should not marry a police officer.

Riggs, Murtaugh, and Butters – with some assistance from Leo Getz (Pesci), who is now a private detective – investigate a Chinese immigrant smuggling ring after they come across a vessel with a cargo hold of Chinese slave labor; in the course of these events Murtaugh's boat is sunk. Murtaugh finds a dinghy alongside with a Chinese family whom he provides shelter for at his house, claiming to be "freeing slaves."

Information about a crime boss named Benny Chan (Kim Chan), a.k.a. "Uncle Benny," leads them to Chinatown, where they are introduced to a high-ranking Triad negotiator named Wah Sing Ku (Jet Li). Benny forces the three cops out of the restaurant without providing information on what his and the Triads' plans are. Outside, the cops encounter the captain of the ship and chase him and another suspect. The other suspect turns out to be a restaurant waiter and is freed. Ku later kills the captain for letting the cops know about their secret plans.

Wah Sing Ku has not been a contender in any CBUB matches.