I've followed you on many adventures...but into the great unknown mystery, I go first, Indy!
Wu Han is a friend of Indiana Jones. His first appearance was in Indiana Jones and the Temple of Doom. He's one of Indy's long-time friends. He appears very briefly disguised as a waiter in the Temple of Doom and is killed by Chen. He is also featured in Indiana Jones and the Emperor's Tomb which takes place before Temple of Doom.
In Lego Indiana Jones
In Lego Indiana Jones: The Original Adventures, Wu Han appears very briefly in the opening cinema of Shanghai Showdown, the first level of Temple of Doom. Unlike the movie, Wu Han is killed by Lao Che's poison.
He also serves as a playable character in free play mode and has a Machine gun as his weapon. He can be bought for 20,000 studs after Shanghai Showdown is completed.
Wu Han has short black hair like Lao Che does.