He's the dude from Sleeping Dogs, probably my favorite GTA-Style game.
He's been tortured to unconsciousness and near-death, only to get up like nothing happened and take out over 100 armed men, half of them while he was unarmed (OBVIOUS SPOILERS):
Won a Martial Arts tournament in a "Enter the Dragon"-type DLC:
During the second video he beats a master of BJJ after being poisoned, and a master of Drunken Fist.
He also has certain outfits that let him do special moves, he's proficient with a sword and staff, knows Drunken Fist, Muay Thai, and Wing Chun. Those are game mechanics because they're restricted to certain outfits, so Wei Shen would know those moves without those outfits.