2. Difficulty in management and control. After drug rehabilitation and recovery personnel return to the society, as they are a huge group, live in a dispersed way, and have a high liquidity, and there is a lack of effectively management measures, many problems that have countless risk factors and are unknown and difficult to manage and control are resulted in. Firstly, drug addicts are mentally distorted and are hard to manage as they intend to avoid other people. Most of the drug addicts are inferior, self-abandoned, and selfish. They are afraid of being looked down upon by others, and unwilling to contract with other people in society, so it is difficult to follow their movements; secondly, they live in a mobile way and have no fixed residence. Due to drug abuse, many drug addicts lose jobs and residence, and they become homeless and live in a mobile way. Some of them even disappear without a trace after they leave drug rehabilitation centers, leading to difficult management (a total of 16,000 drug addicts have become uncontrolled over recent years in Guizhou); thirdly, they conduct illegal behaviors, but evade punishment. Drug abuse is an illegal behavior, and the relapse personnel in particular are afraid of legal sanctions, so most of them have strange behaviors and hide their whereabouts, and it is difficult to find them; fourthly, it is more difficult to manage people infected with AIDS by abusing drugs. Some drug addicts infect with many diseases such as AIDS through drug abuse. People are afraid of AIDS, and these infectors also think that they are heading toward disaster. For this reason, it is more difficult to manage and treat such people.
Busiest line in Beijing: Subway line 10 has reached a daily transportation of 1 million passengers on average