At the end of the Ming Dynasty, there was a doctor in Yunnan named Yin Yuanli, who was very skilled in acupuncture and moxibustion. In order to escape the war, he fled to the mountains for refuge. Seeing that it was getting late, he had not yet found a place to stay. At that time, there were often tigers and wolves in the mountains to hurt people. Yin Yuanli was very afraid, lest he meet wolves, tigers and leopards and be swallowed by wild animals.

When he was in a panic, he suddenly saw two figures in front of him, so he ran over emotionally and wanted to go with them. The two were two big men with big backs and big waists. The big man asked Yin Yuanli where he came from, and Yin Yuanli introduced himself.

Hearing this, the two of them were in awe and said, "So you are Mr. Yin, a famous doctor. You have heard your name for a long time and are like thunder in your ears. When I saw you today, it was really my brother who was lucky for three lifetimes." Yin Yuanli was polite and asked the two of them their names. The two replied, "The name is Ban, one is Banzao, and the other is Banzao." Banzao is the eldest brother, and Banzao is the second brother.

After the two reported to their home, they said to Yin Yuanli, "Mr. Yin, we also entered the mountain for refuge and lived in the stone room. Although it is simple, we can live there. If you don't mind, you can go home with us. We happen to have something to ask you. What do you think?"

Yin Yuanli was overjoyed when he heard that, and immediately nodded in agreement, and then followed the two to a place where there was a house made of stone, built on mountain rocks, and firewood was lit inside as a torch instead of candles.

However, Yin Yuanli felt that the two were tall and powerful, with fleshy faces, and they didn't look good, so he was a little worried that they were robbers. But at this time, there was no place to live, so he had to adapt.

Suddenly, Yin Yuanli heard a groan coming from the bed. He followed the sound and saw that it was an old lady who was lying on the bed and humming in pain, as if she was sick. Yin Yuanli asked Spot Claw and Spot Teeth, "What's wrong with the old lady?" Banya replied, "We asked Mr. to come back to treat my mother."

After saying that, Ban Ya picked up a torch and approached her mother, allowing Yin Yuanli to watch her mother's condition. Yin Yuanli took a closer look and noticed that under the old lady's nose and at the corner of her mouth, there was a huge tumor growing, almost as big as the mouth of the tea bowl. Ban Zao said: "This tumor is not only painful, but also prevents my mother from eating normally."

Yin Yuanli said, "This is easy to cure, don't worry." After saying that, he took out the wormwood velvet and rubbed it into a ball, wrapped it around the needle handle of the silver needle, lit it with fire, pierced into the acupoints of the old lady, and passed heat into the acupoints through the needle body for treatment. After dozens of acupuncture sessions, he turned around and said to Erban, "It will be fine after one night."

The second class heard the happy color and hurriedly went to roast the venison to entertain Yin Yuanli, but other than the venison, there was no wine or rice prepared. Yin Yuanli walked for a long time, and his stomach was already growling with hunger. As the so-called "hunger or food," he picked up the venison and devoured it, and his belly was round. Spot Claw said apologetically, "We prepared in a hurry and the hospitality was not good. Please bear with me, sir." Yin Yuanli replied, "I'm the one who bothered you two. The venison is delicious, you are welcome."

After Yin Yuanli was full, a wave of sleepiness came over. Erban took the stone and made Yin Yuanli a pillow and asked Yin Yuanli to lie down and rest. Yin Yuanli was a little afraid of Erban in his heart, so he did not dare to sleep soundly, just closed his eyes and didzed off, half asleep and half awake for the night. Before dawn, Yin Yuanli got up and asked the old lady, do you feel better? The old lady also woke up at this time, and touched the tumor with her hand, it had broken, but the wound had not healed.

Yin Yuanli urged Erban to get up, lit a fire to check the old lady's wound, applied medicine powder on the careful ground, and then said, "The tumor is gone, just wait for the wound to scab, even if it heals." After saying that, he bowed to the plaque and left.

The two were very grateful to Yin Yuanli and took out a deer leg as dry food for the road, and the three of them said goodbye for three years. One day, three years later, after Yin Yuanli went into the mountains for something, he encountered a pack of wolves and was almost torn apart and eaten by the pack. Just as they were about to die, two fierce tigers broke into the pack, killed the pack of wolves, and then roared away.

At this time, it was already dark, and Yin Yuanli was still alive after the disaster. He was still in shock and couldn't find a place to stay, so he had to go forward in embarrassment. Suddenly, an old lady appeared in front of him. She saw Yin Yuanli and said to Yin Yuanli, "Mr. Yin, you have suffered!" Seeing that the old lady was very face to face, Yin Yuanli asked, "Auntie, what do you think of me? Have we met before?"

The old lady replied, "You are a noble person who forgets things. I am an old lady with a tumor in the stone room. You helped me get rid of the tumor." Yin Yuanli suddenly realized, so he asked to stay at the old lady's house for one night.

The old lady took Yin Yuanli home, but it was not the same house as before, and it was still lit with a torch made of firewood. The old lady said to Yin Yuanli, "I have been waiting for Mr. Yin here for a long time." After saying that, she took out a man's dress and let Yin Yuanli change into the clothes that were torn apart by the wolves.

Then the old lady put out a fine wine and invited Yin Yuanli to sit down and drink. The old lady herself also used a big ceramic bowl and drank a lot, which was very bold and manly.

Yin Yuanli didn't see the Spot Claw and Spot Fang brothers, so he asked the old lady, "Where did your two sons gone? The old lady said, "I specially told them to meet with Monsieur. They didn't come back so late, so they must have gotten lost."

When Yin Yuanli woke up, the sky was already bright, and Yin Yuanli suddenly felt cold. He looked around and found that the house had disappeared at some point, and he was sitting on a rock.

At that moment, there was a sound of heavy breathing like a cow from under the rock. He looked down and saw a tiger sleeping soundly. There were two fist-sized scars on the corner of the tiger's mouth and under his nose. Yin Yuanli looked terrified, afraid that the tiger would wake up, so he crept away from there. Only then did he realize that the old lady and the brothers with claws and teeth were both colored tigers.