Chu Fook can usually be found working at El Matadero, or sitting there at the campsite. He can also be found working at Pacific Union R.R. Camp, where he is usually working inside of one of the warehouses. Chu Fook can also be encountered in random event, where he is the treasure hunter, who's trying to get rid of the criminals trying to kill Chu and rob him. The player may help Chu by killing the criminals and receiving the first treasure map from Chu. This will trigger the second rank of The Treasure Hunter Challenge.
He is one of the missing souls in the "Missing Persons"side-missions which
John Marston will need to rescue and bring back to Fort Mercer in order to attain 100% completion.
Chu can be found in Gaptooth Breach, where he and the miners (if any are still alive) will be attempting to fend off a horde of undead. After Marston kills most of the zombies, Chu will follow Marston onto his horse and ride back to Fort Mercer and safety.