My boyfriend was detained for drunk driving. what do I do?

What you can do now is go to the public security bureau to find out whether your boyfriend is under administrative detention.

Criminal detention

Administrative detention will be released in a few days. If it is a criminal detention, then your boyfriend's

drunk driving

behavior constitutes the crime of dangerous driving and requires criminal liability. This is a criminal offense and there is nothing you can do about it. You can entrust a lawyer to serve as your defender.