What a coincidence, I heard this story told by adults when I was a child. But this is not from "Journey to the West", but from "Every Day Has a Good Story". The name of the story is "Zhu Bajie Changes His Head", and the full text is as follows:

Zhu Bajie Changes His Head

Everyone knows that Zhu Bajie has a stupid head. Zhu Bajie himself was quite anxious. He heard that people are now becoming more and more capable. They can change people's hearts, lungs, hands, and heads! One night in the middle of the night, while Sun Wukong and Monk Sha were sleeping, he sneaked into the human world and went Find a doctor to give him a smart head.

A doctor with a white beard saw that it was Zhu Bajie who came to see a doctor, and he quickly greeted him with a smile: "Welcome, welcome the immortal to come to see the doctor. May I ask where the immortal is feeling uncomfortable?"

"I, I am. I came here to see how stupid I am." After Zhu Bajie finished speaking, his neck turned red with embarrassment.

Doctor Whitebeard said: "Don't worry, Immortal, I will just change your head. What kind of head do you want to change? A scientist's, a poet's, a general's, or an engineer's?"

Zhu Bajie patted his forehead and said: "I just want to change my head to be as smart as my senior brother Sun Wukong."

"Oh, you want to change your head to Sun Wukong's? This is difficult..." The white-bearded doctor rubbed his hands, thought for a while, and suddenly thought of a good idea. He hurriedly pulled Zhu Bajie's big ears and told him gently. Zhu Bajie laughed loudly after hearing this, nodded repeatedly, and hurried back.

Besides, when Sun Wukong and Monk Sha woke up, Bajie was missing and they were looking for him. Suddenly, they saw Bajie coming over with his big belly in his hands and screaming. Sun Wukong hurriedly supported him and said, "Hey, where have you been all morning?"

Zhu Bajie frowned and said, "It's all my fault that I was greedy and had a bad stomach, so I pooped." "Oh, oh..." Zhu Bajie simply rolled on the ground, pretending to be awesome!

Monk Sha hurriedly said to Sun Wukong: "Brother, send Bajie to the hospital for emergency treatment quickly!"

Sun Wukong picked up Zhu Bajie and somersaulted to the entrance of the hospital.

Zhu Bajie was very happy, and said in his heart: "Haha, this time the monkey head has fooled me!"

The two of them walked to Dr. Whitebeard, and suddenly Smelling the fragrance, I felt dizzy, fell down on the bed, and fell asleep.

The white-bearded doctor picked up the laser scalpel, pressed the button, and with a whoosh, a white light cut off Sun Wukong's head. He pressed the button again, and with a whoosh, a white light cut off Zhu Bajie's head. . Ha, that's great, not a drop of blood came out!

In just a moment, Doctor Whitebeard sewed Sun Wukong's head on Zhu Bajie's body, and then sewed Zhu Bajie's head on Sun Wukong's body.

Haha, this is fun. The monkey has a big pig head on its body, and the pig has a small monkey head on its body!

Sun Wukong and Zhu Bajie woke up. You look at me, I look at you, we are both shocked. The monkey head and pig body said: "I am the Monkey King, Monkey King. Hey! What kind of monster are you!" The pig head and monkey body said: "Hey! I am the real Sun Wukong. What kind of monster are you!"

The two weird things got more and more quarrelsome, and they asked Doctor Whitebeard to tell him, who is the real Sun Wukong?

Doctor Whitebeard sighed and said: "Oh! I can tell you. I don’t know, I’d better let you put your heads back!” As he said that, he shook his hand and released a scent, and the two strange things fell asleep again. Ha, after a while, the two heads were put back again.

Sun Wukong punched Zhu Bajie hard and said with a smile: "Why are you making such a joke with Old Sun!" He raised his thumb and said to Doctor Whitebeard: "The doctor's medical skills are really better than those of gods. , my old grandson is finally convinced!"

Zhu Bajie was not happy, his nose turned up all the way, and he muttered: "But I, I am still stupid!

White Beard The doctor said with a smile: "I can put a small computer into the immortal's head and make you very smart."

"Ah, you need an operation? I'm afraid, I'm afraid." Zhu Bajie He held his head and ran away. Sun Wukong was quick and grabbed him and pressed him on the bed.

"Aw, ow..." Zhu Bajie barked a few times, smelled the fragrance, and fell asleep. Dr. Whitebeard put an electronic calculator into his head.

When Zhu Bajie wakes up, he has become a very, very smart new Zhu Bajie!