Don’t underestimate them, these paintings have existed since primitive society, so fingerprint recognition was very skilled in the Tang Dynasty. They can distinguish who belongs to them based on the pattern of fingerprints, and there are records of identifying fingerprints in old books unearthed from the Qin Dynasty, which shows that fingerprints have been used in criminal investigations since then.

The fingerprint identification technology used by modern people was discovered by British scientist Francis Galton in 1892 and was slowly put into use. However, fingerprint technology has been used by humans much earlier than this time. We Chinese discovered fingerprint technology more than 1,000 years earlier than Western countries.

People in ancient China have realized that everyone's fingerprints are different and it is useful to use fingerprints to identify other people. In ancient times, most people were illiterate and few people could write, so they used fingerprints instead. signed.

The ancients had profound wisdom. In China's primitive society, the method of signing and stamping appeared, relying on handwriting to identify people's identities. In the Qin bamboo slips unearthed in modern times, "Sealing Diagnosis Style·Acupoint Robbers", it is recorded that "there are knees, hand marks, knees, and hands inside and outside the acupoints." This shows that during the Qin Dynasty, people had already discovered the characteristics of each person. Different fingerprints can be used to detect cases. By the Tang Dynasty, fingerprint identification technology had developed relatively maturely.

There is a relatively famous person in the United States. In an article he published in 1880, he described the fingerprints left by criminals on cups. These fingerprints can be used as evidence of crimes in ancient times. , fingerprints are often used. Ancient people signed, marked and gave their fingerprints on things like documents, documents, house contracts and land contracts.