Can I check underwear in the subway?

During the subway security inspection, passengers are usually required to put their belongings into the security inspection machine for inspection. Underwear, as an article worn by individuals, will not attract the special attention of security personnel, nor will it be prohibited from being carried. The specific subway security regulations will vary from region to region. It is recommended that you know the local security regulations and requirements before using the subway to ensure that you can pass the security check smoothly.