The access of prisoners to drugs in prisons usually involves a variety of hidden methods. Although prison management will take strict measures to combat such behavior, the following are some common ways that have been reported or studied in history.： ### 1. **Corruption of staff** -**Assistance from internal personnel**: Prison guards, medical personnel or other staff may be bought to use their positions to facilitate the bringing of drugs into the prison. For example, hidden in daily necessities, uniforms, or medical supplies. -**Negligent or intentional release**: Some staff members may be perfunctory in the inspection of parcels, mail, or visitation items, or even acquiesce in the circulation of drugs. ### 2. **Entrainment during visitation** -**Passed by family members or visitors**: During visits, drugs may be hidden in food, clothing, books, or children's products (such as diapers, toys). In some cases, visitors will even be transferred by “kissing and passing” (hiding drugs in their mouths) and so on. -**Physical concealment**: Visitors or prisoners may evade inspection by hiding drugs in their bodies (such as swallowing drug packages). ### 3. **External delivery** -**Drones or throwing**: In recent years, drones have been used to throw small packages of drugs into prison courtyards or windows. In addition, outsiders may throw drug packages from outside the prison walls. -**Work project outreach**: Prisoners who participate in external labor or foreign service may take the opportunity to contact external drug dealers and bring drugs back to the prison. ### 4. **Mail or parcel camouflage** -**Poisoning of letters or photos**: Paper or photos may be soaked in synthetic drug liquids (such as fentanyl), dried and sent to the prison, and the prisoner extracts it again by soaking. -**Package mezzanine**: Daily necessities (such as soles, book binding places) are modified to hide drugs. ### 5. **Abuse of the medical system** -**Prescription drug diversion**: Some addictive drugs (such as opiate painkillers) may be obtained by prisoners by exaggerating their symptoms and then resold or abused. -**Violations by medical personnel**: A few medical staff may prescribe false prescriptions or directly provide prohibited drugs. ### 6. **Homemade drugs in-house** -**Synthesis of raw materials**: Use chemicals (such as cleaning agents) or other legal materials obtained in prisons to synthesize drugs (such as “bath salts” to synthesize cassidone) by simple methods. -**Fermented wine**: Although strictly speaking it is alcohol rather than drugs, the phenomenon of moonshine alcohol also reflects the possibility of the production of contraband in prisons. ### 7. **New prisoners carry** -**Entrained while in jail**: Some prisoners may hide a small amount of drugs in their bodies or hidden parts during pre-jail examinations. Despite the high risk, there are still such cases. ### 8. **Gangs and underground networks** -**Organized trafficking**: Prison gangs may control drug circulation channels, establish supply chains through internal and external collusion, and allocate “sales areas” to avoid conflicts. -**Threat of violence**: Some prisoners may be forced to participate in drug trafficking activities, otherwise they will face gang violence. ###Prison response measures Prison management departments usually adopt strict searches, restrict visitation items, install drone jamming equipment, strengthen staff reviews, and combat the circulation of drugs through urine tests. However, due to the closed nature of the prison environment and resource constraints, there are still challenges in completely eliminating it. It should be emphasized that drug dealing is a serious offense in prisons, and those involved may face extended sentences, solitary confinement, or criminal charges. This answer is only based on public information analysis and does not encourage or glorify any illegal activities.