In ancient times, there was no fingerprint identification. Why do you want to sign by fingerprint?

In ancient times, there was just no high-tech scanning recognition created by modern civilization. It doesn't mean that people can't identify manually, nor does it mean that they don't have the skills to identify fingerprints. Maybe it's just lost or not found by archaeologists.

Let's talk about why we should draw lots and press fingerprints.

In fact, in the Qin Dynasty more than 2,000 years ago, China had a record of using fingerprints to solve crimes. The article "The Thief who Closed the Cave" unearthed in Yunmeng records: "There are knees, characters, knees and hands everywhere inside and outside the cave". This shows that the judicial personnel in Qin dynasty have regarded "handwriting" as a method to solve the case and as a kind of material evidence for judicial inspection of the crime scene.

Since then, all previous dynasties have followed the habit of taking finger mold and palm mold as mirrors in literature. The ancient army of China had a jump book to register the fingerprints of soldiers for inspection. This shows that fingerprints can be correctly classified by morphology and structure at that time, and this classification feature and knowledge have been applied to social practice.