This morning, the elderly activity room in Furong community was full of people, and the elderly were listening to health lectures. The speaker was a professor surnamed Hu, who was in his forties and wore a pair of rimless glasses. Professor Hu was talking about common sense in bone and joint health care. As he was talking, he took out a glass bottle from his bag. The bottle contained Baijiu, and the wine was dipped in a colorful snake. He said: "In fact, what is the best medicine for joint pain? It is Thai snake medicine wine. People who drink it say that it works very well!"

In the crowd, Granny Zhang's eyes lit up when she heard this, and she asked, "Where is this Thai snake wine for sale?" Professor Hu said, "If you want to buy it, I will bring two cases this time, and the discounted price is only 180 yuan per bottle."

Some of the people who listened to the lecture were skeptical: I said I was going to listen to the lecture, how did I sell Thai snake medicine wine? But then I thought: this is a community-organized activity, and it is impossible to deceive old people! So Grandma Zhang, Uncle Li, Grandma Wang and others swarmed up and bought it with money. After a while, the two cases of Thai snake medicine wine were sold out.

Professor Hu told everyone again: From today on, drink one cup every day for a total of 20 days. On the morning of the 21st day, which is also the time, everyone will come here with wine bottles, and he will evaluate the effect of the medicine.

After seven or eight days, Uncle Li met Grandma Zhang at the vegetable market. Both of them said that their waist and legs felt better after drinking Thai snake medicine wine. Other elderly people also said that snake medicine wine worked well.

In the morning, the old people came with bottles of wine. Professor Hu asked, "After drinking the snake medicine wine, please raise your hand if you feel it works!" Most of the old people raised their hands. Professor Hu asked again, "Please raise your hand if you feel it doesn't work!" Three old people raised their hands. Then he asked, "Is there anything that hurts more after drinking it?" No one raised their hands.

Professor Hu was very happy and said, "It turns out that this Thai snake medicine wine has about 80% of the effect on treating joint pain in the elderly. It has such an effect. This is a great medicine!" Professor Hu held up his glasses and continued, "Please open the wine bottle and take out the snake inside to take a look!" So everyone took out the snake one after another, and when they saw it, they were all dumbfounded: this snake was made of plastic! Everyone was angry, Uncle Li's face was red, and he asked Professor Hu sharply, "How can you deceive us old people?"

Professor Hu was not angry and said, "I'm sorry, but I want to ask - at this moment, do you feel better about your joint pain?" Everyone rubbed their waists and touched their legs, feeling very annoyed, and someone replied, "What's good? It's still the same!" Professor Hu smiled and said, "Uncle, aunt, don't be impatient, listen to me slowly." He took out the plastic snake and demonstrated, "There are many small holes in the snake's body, and there are zippers under the belly. After opening it, you will find that there is a small bag inside, and there is medicine in the bag, so the snake is a fake snake, and the medicine is real medicine!" Saying that, Professor Hu took out a bulging small bag from the lower abdomen of the snake, and everyone suddenly realized.

No, Uncle Li still had a question: "Why not put it directly into a real snake?" Professor Hu explained that wild snakes in Thailand vary in size, so it is not easy to bottle, and with real snakes, its medicinal effect is not as good as that of refining. Everyone finally understood. Then Professor Hu asked again, "Does everyone feel better now?" Everyone was embarrassed and replied with a smile, "It's better..." "Hahaha..." Professor Hu laughed at everyone.

At this time, Professor Hu smiled and explained that it seemed that the main effect was not medicine, but mental state. In fact, he was not a health expert, but a psychologist, and this time he was doing a psychological experiment with everyone. The experiment showed that a good attitude can relieve pain, and I hope everyone maintains a good attitude every day. After that, Professor Hu refunded the money he had received last time to everyone.

From then on, the elderly danced, sang, and volunteered more, and the number of sick people cried less…