Is it reasonable for the public security organs to extract the hair of the hotel manager?

It is reasonable, this may be hair left at the crime scene, or where something is suspected to have happened.

Whether it was left behind by you at the scene or for some reason, you need to go to the police station to collect the hair for DNA identification. There is no need to be afraid of this. If you are innocent, the police station will not accuse you unjustly. If you have done something wrong, be honest about it.

The "Procedural Regulations for the Handling of Administrative Cases by Public Security Organs" stipulates that portraits, fingerprints and other human biometric information can be extracted or collected in accordance with the law for suspects suspected of driving a motor vehicle under the influence of alcohol, taking drugs, engaging in terrorist activities, etc. For illegal activities, blood may be extracted or collected in accordance with the Road Traffic Safety Law of the People's Republic of China, the Narcotics Control Law of the People's Republic of China, the Anti-Terrorism Law of the People's Republic of China, etc. , urine, hair, exfoliated cells and other biological samples. Information that has been extracted and collected during personal security inspections and on-site inspections will no longer be extracted and collected.