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Lee Siu-Lung is a Chinese immigrant. He makes a living as a treasure hunter in various parts of New Austin and West Elizabeth.
In New Austin, Lee Siu-Lung can most often be found in Thieves' Landing, where he plays poker. He can also be seen working at the local horse corral. In Blackwater he sometimes appears riding through the city streets, and on rare occasions can be seen taking part in a petty criminal act such as horse theft.
The player may also encounter Lee in either Hennigan's Stead or certain areas of West Elizabeth, trying to protect his supply wagon from attack by bandits. This encounter is similar to the one involving Chu Fook, and can be used to initiate the Treasure Hunter Challenges if the player has missed the meeting with Fook.