How many shortcuts did the wisdom of the ancients provide for modern times? Did you know that thousands of years ago, the ancients discovered that fingerprints could distinguish each individual? Even without sophisticated instruments, many unjust, false and misjudged cases have been rehabilitated with the naked eye. Then how did the ancients discover this secret?
There was a story, starting from the Song and Yuan Dynasties. In the Northern Song Dynasty, there was a man named Yuan Jiang who was as fond of investigating cases as Conan. He received a case shortly after he took office. The victim of this case is Zhou Zheng. His family still has some land, but he is deeply involved in gambling. It happened that his land was attracted by a bully. This bully is very scheming. First of all, he cheated and Zhou Zheng lost. Yuan Jiang must have overturned his case when he found out. Yuan Jiang carefully checked the title deed and finally saved Zhou's field. Since then, this incident has opened the ancients' understanding of fingerprints and is a milestone in the history of fingerprint development!
Some people also said that since there was no fingerprint technology in ancient times, wouldn't it be possible to do bad things without admitting it? How on earth can the government prove whose fingerprint it is?
Fingerprint was indeed a double-edged sword in ancient times. The advantage is that you can prove your innocence or keep your promise. Why don't you deny your debt? Because the ancient people had high moral standards. They think that once they sign the letter of guarantee, it is a foregone conclusion, and they can't go back on their word at will. People with bad conduct will be punished. Because there is no culture, this is something that has gradually become a law and regulation. The disadvantage is, of course, random planting or forced signing. When a person has no education, government officials or powerful people will believe everything they say and sign a piece of paper they don't even know what it is. What makes people even more angry is that if the "prisoners" who are forced to sign in prison don't meet a hard-working government official with high moral standards, much more houses and land may be sold.
However, the advantages of fingerprints outweigh the disadvantages. At least in ancient times when there was no "fingerprint technology", it became a legally effective way and a dignified binding force.
Back to modern times, why can fingerprints distinguish each individual? How are fingerprints distinguished?
The most common thing is that when I was a child, my elders would say, look at how many laps your fingerprints are. Is the circle closed? If so, you will become rich in the future! This must be a superstition, but it is not difficult to see that fingerprints that can be distinguished by the naked eye have many shapes in daily life.
Fingerprints are handprints, that is, the concave and convex texture of fingers, much like contour lines in geography. Why are fingerprints equal to handprints? This is because your fingers will sweat unconsciously, so your fingerprints will be left everywhere you touch. When you sign some agreements with your handprint, its principle and function are like stamping a seal.
I didn't expect that "fingerprint technology" has long been understood, and even the function of "fingerprint" has been used to this day, which is really admirable.