Just over an hour's drive from the congested centre of Wuhan , a large alabaster building with a blue-tiled roof and landscaped courtyard sits amid sprawling fields. Flanked by farmhouses, it is accessible only by car or taxi.
Its inhabitants have travelled from around the mainland to enter its doors, staying for up to a week at a time. Their aim is to suppress heroin addiction.
In one room of the Kangjiu clinic, a petite 25-year-old woman with pigtails has just undergone minor surgery to place an implant of naltrexone, a drug that blocks the effect of heroin or other opiates, beneath the skin of her stomach.
One of her neighbours has just undergone similar surgery - for the second time. He wants to make sure it will still have an effect and keep his heroin habit at bay.
Upstairs, fellow patients are playing table tennis or watching TV as they recover from a three- or four-day detoxification process. A large team of medical staff is on standby should they require anything.
Their experience is in stark contrast to the detox process for most of the heroin addicts on the mainland. Placed in state-run drug enforcement centres run by the police, they must suffer the effects of sudden heroin withdrawal, or cold turkey, and the only rehabilitation is forced labour.