Drug addiction in China is highly stigmatized. And now, some doctors are trying to cure it with a radical procedure known as as a "stereotactic ablation." More simply, it's the practice of destroying parts of the brain's "pleasure centers" (the nucleus accumbens) in heroin addicts and alcoholics as a way to stop drug cravings. At the same time, however, damage to this region could also impair a person's ability to experience natural longings and other emotions, including joy.