Although there was no fingerprint technology in ancient times, they knew that everyone's fingerprint was unique, and they could tell who the owner of this fingerprint was with the naked eye, so it was one of the necessary procedures.

Probably in the Warring States period, people discovered the importance of fingerprints. In ancient books or some excavated cultural relics, archaeologists found cases that were detected according to fingerprints. For example, the Qin unearthed in Hubei? Yunmeng bamboo slips? The above describes a theft case, and people at that time actually found criminals according to fingerprints, that is to say, the ancients not only let prisoners use fingerprints to draw a bet, but also can use the uniqueness of fingerprints to solve the case.

one of the most important reasons for using fingerprints to draw a pledge is because the right to education was limited in ancient times, and drawing a pledge is the simplest personal identification code. At that time, many ordinary people couldn't write their own names at all, so it was unrealistic to ask them to sign their names. Therefore, fingerprinting is the most convenient method regardless of various factors.

So, how did people at that time rely on the naked eye to identify the owner of fingerprints? The most important way to tell is to look? Snail? Or? Basket? The number of. ? Snail? Refers to the spiral fingerprint. Basket? It refers to a fluid fingerprint. It is also possible that two suspects are all of the same type of fingerprints, but the trend will still be different, and the number and long position will also be very different. Generally speaking, few fingerprints of two suspects are very similar, like that.

It must be said that the wisdom of the ancients is infinite, and now the fingerprint technology has developed very well, and a lot of high technologies have come out accordingly, such as fingerprint password, fingerprint unlocking, fingerprint door lock and so on. Fingerprint is still an important evidence to solve a case. There are rarely two identical fingerprints in the world, and it is impossible for twins. Therefore, the law is long and sparse, and no matter who commits a crime, he can't escape legal sanctions.