Closed management of Zhenfeng Renzhi School. Zhenfeng Renzhi School is not a juvenile detention center. According to relevant data, Renzhi School in Zhenfeng County is a special school with more than 200 students, ranging in age from 14 to 16. Most of these students are teenagers called "problem of juvenile". Zhenfeng Renzhi School is the only private school in Southwest Guizhou that specializes in full-time, closed, boarding and militarized management. Therefore, Zhenfeng Renzhi School is closed management. Closed management is to take the whole building as the management unit, isolate the building (including the affiliated site) from the outside world with isolators, control and manage the mobile elements such as people and cars entering and leaving the building area within the management scope, and provide meticulous services such as clothing, food, shelter, transportation and use for the owners and users.