Yuen first appeared in Hard Boiled in 1992. The film begins with him leading a squad of police officers into a Hong Kong teahouse where an arms deal is taking place. A shoot-out then ensued and a number of police officers were wounded and his partner, Benny, killed. Tequila then executed the gangster who killed Benny, rather than arrest him. For this, he was ordered off the case by his Superintendent, Pang, as the gangster was a senior member of a local Triad. Despite his orders, he continued with the case and went after "Uncle" Hoi, a Triad boss. He went to a warehouse that Hoi's gang owned, but found that he and his men had been killed by a rival group led by Johnny Wong. Another gun fight broke out and Tequila killed most of the opposing gangsters. When he was face-to-face with Alan, one of Wong's men, he was unable to kill him as he was out of bullets. Alan was then free to kill Tequila, but chose not to. Pang later revealed that Alan was an undercover police officer, and that one of the gangsters killed earlier in the teahouse was also deep cover. Yuen then set up a meeting with Tony to sort out the situation. They met at the docks, but were attacked by the remaining members of Hoi's gang. They manage to kill their attackers.
