South China's Shenzhen City destroyed more than 320 drug dens and seized 12.25 tonnes of narcotics as of July this year, Xu Wenhai, Shenzhen's deputy mayor, said Tuesday.
Suspects associated with the dens were involved in more than 4,600 drug-related cases, Xu added.
Local police have established offices to handle anti-drug and drug rehabilitation work in all 74 sub-districts in Shenzhen this year. More than 600 employees were recruited to work in rehabilitation centers in 126 communities across the city.
Additionally, drug education and prevention was promoted in 31 primary and middle schools.
