During the Wanli period of the Ming Dynasty, there was a legend in Datong Mansion in Shanxi Province. A woodcutter went up a mountain to cut firewood. He accidentally found a cave to take shelter from the rain and went in to hide from the rain. After entering, he found that there were many gold and silver treasures hidden in the cave, piled up like mountains. He threw away the firewood cut from the mountain, took off his clothes and wrapped a whole bag of treasures and went home. From that day on, he became rich overnight and became a famous local rich man.

He quietly told his wife about the cave and told her to keep it a secret. However, a strange thing happened. After a month, the woodcutter suddenly became dazed. His wife searched all the best doctors around and couldn't see him.

The wife remembered what he had told her, so she went to the village chief. Therefore, the village chief gathered the strong men of the village and went to the mountains to see what happened. Soon they found that the cave, like the woodcutter, all the people who entered the cave came back with a large bag of gold and silver jewelry. The news of the cave spread more and more widely, and the people in the village came to this cave to retrieve treasures, and the whole village suddenly became rich. After the same month, everyone who went into the cave to retrieve treasures became as stupid as the woodcutter, and almost the whole village was like that. The few people who did not enter the cave no longer dared to enter the cave.

One day, a Taoist priest came to the village and said that he could cure dementia in his village, but there was a condition that sick people must spend all the money they got from the cave. Therefore, the village began to sell their belongings one after another, and loaded several large carts and handed them over to the Taoist priest. The Taoist priest hired a few strong men from other places to carry away the treasure of several large carts. Before leaving, the Taoist priest gave a letter to the people of the village, saying that as long as he followed the above method, he could cure the disease in the village. The people of the village opened the letter, and it was written on the letter. "Wealth comes from greed, but misfortune comes from obsession. I want to cure the disorder of the heart, and I want to find people who have no heart."

People in the village talk a lot, don't they think there are not enough fools in the village? A smart villager told these people that there are so many fools in the village who are not stupid at first, and now they are looking for people who are already stupid. At this time, everyone thought of the village's Wangcai, who was an orphan. He didn't know who was thrown into the mountain temple and picked up by good-hearted people.

The villagers discussed the possibility of letting Wang Cai go to the cave, and the disease in the village would be cured. So everyone found Wang Cai, took him to the cave in the mountains, and let him go in and have a look. After a while, Wang Cai came out happily with a clay figure in his hand. Everyone was anxious to go back to the village to see what had changed, so they took Wang Cai and rushed to the village. When they returned to the village, they still looked the same, and those people were still demented.

Just then, a miracle happened. Wang Cai walked into a house with the clay figurine and shook the clay figurine in front of the patient. The man immediately trembled like a ghost, screamed in shock, and broke out into cold sweat. The villagers were about to go up to stop him, but after seeing the man's cold sweat, his sanity returned to normal.

Most of the people in the village were cured, but only a few families were still dazed. Seeing this, they hurriedly came over and pulled Wangcai, asking him to go up the mountain to the cave to get a clay figurine to treat their family. I saw that Wangcai, as soon as he looked dazed, spit out a sentence: "If your heart is not pure, you will not be sick." It turned out that the families did not hand over all the wealth obtained in the cave to the Taoist priests, but secretly left some hidden in their homes, so the clay figurine would not work in front of them. Now, it is too late to regret, but it is too late.

Seeing that Wangcai was no longer stupid, everyone in the village gathered around curiously, wanting to see what happened, and Wangcai slowly revealed the mystery. In fact, the cave was named "Test Heart Cave" by the mountain god here. Seeing that the village was very poor, he moved the heart of the silhouette and opened the cave door to test the hearts of the people. If the folk customs were simple, it would be a blessing.

It turned out that next to the gold and silver treasures, the mountain god stood a stone tablet with the words "one for each person, more will change", but the eyes of the people who entered the cave only had this hole full of treasures, but they could not see the words on the stone tablet at all, so there was this disaster. Afterwards, the mountain god saw that the disaster was caused by his good intentions for a while, and he couldn't bear it, so he turned into a Taoist priest to rescue everyone, because only those who are heartless will not have greed, so they can choose clay figures without treasure, and only this clay figure can solve the villagers' heartbreak.

He was originally a nameless immortal in the mountains, but he was demoted to a mortal and punished here for breaking the shrine. Today, the punishment period has expired, so he should return to the mountain with the mountain god to protect this 'heart test cave '. He also told everyone that the cave door had been sealed, so don't look for it again, and said that he bowed deeply to the villagers to thank them for their many years of nurturing. After that, he left the village and went up the mountain, and no one saw him again. After that, several families went up the mountain to look for the cave many times, but no one ever found it again.