Ture transcranial direct current stimulation (tDCS) intervention combined with computerized cognitive addiction therapy(CCAT) group, last 25 minutes per day for 4 weeks(5 days/week). Electronic follow-up for 6 month including drug knowledge every week, self-evaluation every two weeks and outpatient follow-up reminder every four weeks.

Sham transcranial direct current stimulation (tDCS) intervention combined with computerized cognitive addiction therapy(CCAT) group, last 25 minutes per day for 4 weeks(5 days/week). Electronic follow-up for 6 month including only outpatient follow-up reminder every four weeks.

During the treatment, the participants in control group only received treatment such as education of psychology, health and judicature, physical training as well as vocational training as usual in the compulsory rehabilitation center.

Ture 1-2 mA current of tDCS intervention in patients' binary brain DLPFC areas(20 mm).

Participants were instructed to watch methamphetamine-related videos by VR and rate their level of craving after smelling and recalling the last time they engaged in drug use. Craving was assessed by visual analog scales (VAS), with 0 mm being "no craving"and 100 mm representing "most craving ever experienced for methamphetamine".

Participants were instructed to watch methamphetamine-related videos by VR and rate their level of craving after smelling and recalling the last time they engaged in drug use. Craving was assessed by visual analog scales (VAS), with 0 mm being "no craving"and 100 mm representing "most craving ever experienced for methamphetamine".

A Chinese version of the MA addiction dot probe task (DPT) is used to evaluate the attention bias towards drugs.

Chinese version of the CogState Battery was used to assess cognitive function.