Fingerprint technology is another great invention in ancient times. It was before four inventions. At that time, both state and private contracts had the legal obligation to stamp fingerprints. "Fingerprint printing is a contract" Unexpectedly, in 188, a thousand years later, it was introduced to the west, which attracted the appreciation of scientists in Britain and Germany.

at that time, the world lacked the means to identify people. I didn't expect China fingerprint technology to distinguish people from others so easily and accurately. Therefore, some people say that this is a great discovery comparing these four inventions. China in the Tang Dynasty, the state and private contracts, the law stipulates that fingerprints-"as contracts" should be sealed and used fairly and maturely, and then spread to the west around 188, attracting the attention of British and German scientific and technological workers.

at that time, the world lacked the means to identify people. I didn't expect China fingerprint technology to distinguish people from others so easily and accurately. The first step of police work has caused a revolution in the global police field. Zhao Xiangxin, director of China Criminal Science and Technology Committee, believes that fingerprint research has a long history in China, and Xinjiang Museum has original fingerprints of old wills, businessmen and contract documents. This shows that fingerprint technology was used in China very early in ancient times.

At present, the study of fingerprint genetics is limited to the study of congenital genetic characteristics. Although the traditional fingerprint technology is also an exploration of fingerprints by ancient ancestors, it was caused by historical knowledge factors under the conditions of science and technology at that time. There are many non-scientific components, such as official transportation, wealth and peach blossom, which are not determined by heredity or fingerprints.

Over the years, fingerprints have three main characteristics in biometrics: uniqueness, lifelong invariance and convenience. Fingerprint collection technology products have matured and will definitely enter thousands of families. However, fingerprint identification technology "will never be profitable for some businessmen".