How can the detention center know your major?

In the detention center, your professional information can be known in the following ways:

1. Personal statement: You can voluntarily provide your professional information to the detention center, such as voluntarily telling the police your occupation or education when you are arrested.

2. Relevant documents: The detention center may check your ID card, student ID card, work permit and other documents to obtain your professional information.

3. Family members or lawyers provide: If your family members or lawyers know your professional information, they can provide it to the detention center.

4. Investigation and evidence collection: If your professional information is related to the case, the police may obtain it through investigation and evidence collection.

In short, your professional information may be known in the detention center, but if you don't want to be leaked, you can not voluntarily provide and protect your certificate information, and try to avoid the behavior related to the case.