A multi-millionaire Thai industrialist, Hai Fat is the owner of Hai Fat Enterprises. Prior to the film's events, a British scientist named Gibson is employed by Hai Fat to develop a solar energy device capable of solving the world's ongoing energy crisis. With the help of his contruction company, a highly efficient solar powerplant is constructed on an island owned by Hai Fat's junior partner and personal assassin, Francisco Scaramanga.
However, following its completion Gibson attempts to return to Britain; bargaining for immunity with a critical component of the powerplant: the Solex Agitator unit. Having outlived his usefulness, Hai Fat dispatches Scaramanga to assassinate the scientist and recover the Solex.
After meeting with his British contact at a Hong Kong strip club, Gibson is assassinated by Scaramanga and his invention stolen from the crime scene by the assassin's diminutive assistant Nick Nack. With the help of Gibson's contact, Hip, James Bond surmises that Hai Fat employed the "Man with the Golden Gun" to murder Gibson and proceeds to investigate the industrialist at his Thai home.
After scaling the estate's walls, Bond introduces himself to Hai Fat as Scaramanga, assuming that the two men never met during their dealings. Aware of his identity, the millionaire plays along with 007's ruse and invites him to dinner later that evening. Upon returning to the estate Bond is set upon by Nick Nack and two sumo wrestlers, who eventually overpower him and prepare to deliver the final blow. Suddenly they are interrupted by Hai Fat who insists that they move Bond to his martial arts school, rather than allowing him to be killed in his home.
After Bond escapes from the school Hai Fat attempts to flee, prefering to lay low rather than further jeopardizing his substantial investment in Gibson's solar technology. As he makes the preparations, he instructs Scaramanga to return the Solex to the powerplant and stay there until receiving further orders. As the assassin quickly assembles the infamous Golden Gun from his personal belongings, Hai Fat reminds him of his subordinate position and demands that he keep out of his business.
- Hai Fat: "Bond doesn't know you're in Bangkok. He's never seen you, but he knows me. That's the problem."
- Scaramanga: "[Now pointing his gun at him] That's no problem."
- ―Hai Fat's final discussion.[src]
Stating that he regrets employing Scaramanga, the industrialist notes that while Bond is unaware of the assassin's identity and presence in Bangkok, he is very much aware of his own his identity. Scaramanga, his pistol now fully assembled and aimed at Hai Fat, retorts "that's no problem" before shooting the surprised man in the chest. With his employer dead, pretended that he retired, Francisco takes the solex, powerplant and Hai Fat Enterprises for himself; planning to sell Gibson's solar technology to the highest bidder - criminal or otherwise. As for Hai Fat's corpse, he suggests that one of the man's aides put it in the mausoleum he had been so proud of in life.