Three things that best embody the "smart and cunning" character of Hong Haier in The Journey to the West.

First, in order to eat the flesh of Tang Priest, he became a child of a ruined family, cheated Tang Priest, knew that the Monkey King had a strong hand, and what's more, pretended to be poor, and finally achieved the goal of capturing Tang Priest.

Secondly, he learned that the Monkey King and others wanted to invite Guanyin Bodhisattva, so he made a fake Guanyin and took Pig away.

Third, the Monkey King turned into Niu Wangmo and went into the cave. Just because Niu Wangmo said "fast", he immediately became alert. Later, he was tempted by "birthday" and finally saw through the Monkey King.