Signature painting is a common scene in ancient film and television works, but at that time, the so-called painting pledge was not used for fingerprint comparison, but as a certificate for personal signature. In ancient times, not all people were able to receive compulsory education like we do. So most people in society are illiterate. In many cases, documents needed to be signed and confirmed by individuals, but most people didn't even write their own names, so they came up with a solution, which was to press the fingerprints, a simple, fast, and safe method that quickly became popular.
Fingerprint technology is also suitable for the confidentiality of confidential documents. China was the first country in the world to apply fingerprint technology to secrecy measures. In the pre-Qin period, people used seals or fingerprints as seals for confidential documents. At that time, the literature was mainly written on bamboo janes. First the bamboo strip is rolled up, then sealed with clay, and finally stamped with a seal or finger print on it. If the documents are peeked at, fingerprints on the clay are destroyed. If you want to fake the full look, you have to reprint the finger print. But no one's fingerprints are the same, you just need to compare them to know if they're authentic.
Fingerprints were widely used in ancient societies. In addition to government documents, daily IOUs, house deeds, etc. It is also used in criminal trials. Once the prisoner signed, he pleaded guilty. The question is, in ancient times there was no fingerprint reader, so why would a prisoner draw it?
The Fengzhen Style - Cave Thief records: "There are knees, handwriting, knees, and hands in the inner and outer parts of the cave. "This is the earliest record of using fingerprints to solve cases. It can be seen that people knew fingerprint comparison in the Qin Dynasty and applied it to solve cases.
The ancients very early on collected, studied and analyzed the fingerprints of the masses, dividing fingerprints into "buckets" and "ji". "Du" is a spiral fingerprint, and "Ji" is a flowing fingerprint. By analyzing the nodes and forms of fingerprints, it is not difficult to get results by comparison. What's more, there is a special person to supervise the painting to ensure the integrity and recognition of the fingerprint. At that time, although it was mainly identified with the naked eye, the accuracy rate was not as high as that of modern fingerprint readers, but it was quite reliable as a means of detection, so it was difficult for prisoners to deny their claims.
Later, in order to avoid some prisoners going to extremes, the finger that printed the fingerprint was cut off, so it directly became the whole hand or the whole foot, because no one wanted to sacrifice so much. While fingerprint technology is a new technology of the 21st century, our ancestors applied it more than 2,000 years ago. Therefore, do you also particularly appreciate the wisdom of the ancients, and practice has also proved its feasibility, otherwise it would not have been widely used in modern times. The technology left to us by the ancients is the crystallization of their wisdom, and we should inherit and carry it forward.