About fingerprints

Oh, you've gone too far! Everyone's fingerprints are different, which should be clear!

First of all, how do foreign countries find criminals through fingerprints? As long as they are born in their own country, whether you break the law or not, you should first collect fingerprints and put them in the database, and then you can find the criminals according to them.

In China, for various reasons, it is impossible to collect fingerprints of all people, and the conditions are not enough. So China only allows prisoners to take fingerprints. As long as they have committed crimes, they will collect fingerprints. Then they can find you according to the fingerprints at the scene. Those who have not committed a crime, that is, those who are not in the fingerprint database, can only find the suspect through investigation and other means, and then compare the suspect's fingerprints with those at the scene to determine the criminal. China will definitely in the future.