1. At present, most regular Internet cafes in China require that Internet surfers check their ID cards and surf the Internet under their real names. Generally speaking, minors who do not apply for identity cards or carry their own identity cards are suspected of violating the Law on Public Security Administration Punishment and fraudulently using other people's identity information, and may be punished by public security.
2. Taking photos, taking blood and fingerprinting are equivalent to collecting personal identity information. To put it bluntly, minors who have been in internet cafes for a long time have a more prominent criminal tendency. The purpose of this is to better control.