Place pork roast in slow cooker

Mix Hoisin sauce, oyster sauce, dark soy sauce, honey, Chinese five spice, and cayenne pepper in a bowl. Add mixture to the slow cooker.

Mix in water. Make sure the roast is not entirely submerged.

Cook for 10 hours, turning roast a few times so the outside crisps slightly on all sides.

Pull roast apart with two forks until it looks shredded.

Taste. Add more spices if needed.

Cook for 2 more hours on low heat.