Let's talk about the old story in "Liezi" first, maybe it would be more appropriate to call it a fable. In fact, a fable is a story that dives into depth.

The background is the early years of the Warring States Period, and the cause of the story is a Shaanxi person, who is called a Qin person according to his identity back then. The surname of the Qin people is Feng, and there is a son in the Feng family who was a prodigy when he was a child, and he was precocious. But when he grew up, he suffered from the "disease of confusion", "I thought I cried when I heard songs, I thought I was black when I saw white, I thought I was rotten when I was fragrant, I thought I was bitter when I tasted sweetness, and I thought it was wrong to do what I did." As far as it is intended, the four directions of heaven and earth, water, fire, cold and heat, are all wrong." What Xiao Xiao got was the disease of reversing black and white, confusing right and wrong, and thinking disease. Lao Feng was very anxious, and found out that there was a famous "gentleman" in Lu State, who was an expert in treating this disease (it was not explicitly stated in the story, it is estimated that it refers to Confucius), so he took Xiao Xiao to go abroad to see a doctor. When passing through Chen Guo, I met Lao Tzu by chance, and went to the doctor when he was sick, so I asked Lao Tzu to take a look first. Lao Feng's status is not low, at least he is a heavyweight civil servant, and he can make an appointment with a big-name cultural person anytime and anywhere.

After Lao Tzu learned about Xiao Xiao's situation, he said a unique word to Lao Feng, which is very enlightening for today. Lao Tzu got straight to the point and talked about two meanings. The first layer is to interrogate Lao Feng, on how can you judge that this situation is a disease? For example, it is common today to "confuse what is wrong, be confused by the interests and harms, and there are many people who are sick with the same disease, but there are no enlightened people." This sentence is very powerful, if it is a disease, it is also a social epidemic, and it is a common disease. If it's not a human disease, it must be a social disease. Just like the sentence that judges the social situation today: the confusion of values leads to the decline of the bottom line of social understanding and morality.

The second meaning of Lao Tzu is: If a person's values are confused, it is nothing to a family. A family is lost, and it is nothing to a village. A village is lost and is nothing to a country. A country that is lost is nothing to the whole world. The whole world is confused, and that is also a kind of social unity. If everyone in the world is the same as Xiaofeng, you will become a confused person. Lao Tzu's concluding remarks are that my understanding of "may not be a mystery", but I know that the "gentleman" of Lu is a confused master, and he can't help your son at all.

There is no follow-up to this story in "Liezi", and it is not explained whether Lao Xiao went to Lu Country or not. The value of a good parable lies in activating the multiple possibilities in the field of knowledge.

Antiparticles are a concept in modern physics, and I don't know anything about it, so I copied a sentence from a textbook: "The individual forms of matter below the nucleus, as well as leptons and photons, are collectively called particles." All particles have the same mass, lifetime, spin, and isospin, but have different quantum numbers such as charge, baryon number, lepton, and singular number, which are called antiparticles of this kind of particle. Particles and antiparticles are two different types of particles, except for some neutral bosons. "A physics student told me that particles and antiparticles are the result of human understanding of matter in the 30s of the 20th century. After the 90s, there was a continuation, and antimatter was captured. Particles and antiparticles are both normal material beings, but they exist in two directions. When particles and antiparticles meet, it is terrifying, and the two annihilate, breaking out into a nuclear reaction and releasing extreme energy.

My superficial understanding of antiparticles is that if there is a positive number, there is a corresponding negative number, separated by at least one zero. Positive and negative numbers are not divided into two, and it is not that positive numbers are correct, negative numbers are perverse, and sometimes the opposite. The value of negative numbers is that they are difficult to detect and capture. People are busy with positive numbers all day long, ignoring the corresponding objective existence, and they sow the seeds of "obscurity and disadvantage".