A police officer instructs a tai chi class at a rehab center in Yunnan.[Photo provided to China Daily]

Residents line up in the square at a rehab center in Yunnan.[Photo provided to China Daily]

One of the inmates takes part in a flower arranging class at a facility.[Photo provided to China Daily]

Inmates learn massage techniques as part of their vocational training.[Photo provided to China Daily]

A police officer leads a chorus at a rehab center.[Photo provided to China Daily]

A glimpse of one of the dorms at a facility, which are kept spotless.[Photo provided to China Daily]

Centers provide a range of activities to relieve stress as part of the program.

A former drug user takes a virtual-reality test at one of the centers.[Photo provided to China Daily]