The Taoist's Donkey Dream

Go to the entrance of Linjiangyi Prison to trigger the encounter.

After arriving, interact with the donkey meat burger shop owner to trigger the quest.

Find the Sleeping Taoist, place herbs in the incense burner, and enter his dream.

Inside the dream, talk to the Green Donkey, Infatuated Donkey, and Melancholy Donkey, then exit the dream.

After exiting, talk to the Sleeping Taoist, return to the donkey meat burger stall, and buy a Black Heart Donkey Burger.

Eat it from your inventory, pretend to have a stomachache, then talk to the Sleeping Taoist to complete the quest.