In a closed environment like a prison, the source of drugs is strictly controlled. It is an extremely serious violation of regulations or even a criminal act for prisoners to obtain drugs. This should not happen and will be severely punished. There is no so-called usual way to obtain drugs. Prisons have strict security precautions and management mechanisms, and the intensity of the prohibition of contraband is very strong. Once a prisoner is found to be involved in drug-related behavior, he will be dealt with seriously in accordance with the law, including punishment measures such as increased sentence and confinement, in order to maintain the safety order and reform environment of the prison. We should firmly resist and oppose any illegal and criminal acts and jointly maintain the rule of law and a safe environment in society.