From Liaozhai, it depicts the loyal friendship between two scholars. Cheng risks everything to rescue wrongfully‑imprisoned Zhou. Later Cheng becomes an immortal, swapping bodies with Zhou and revealing worldly illusions before they transcend mortal life.
When Master Yu was young, he was a chivalrous character and was fond of martial arts. He was so strong that he could hold up a huge tea kettle full of water with one hand and twirl it around.