Inclusion Criteria:  Participants aged 18-65 years old; and Being right handed; and Able to communicate in Cantonese; and With the diagnosis of schizophrenia meeting the diagnostic criteria of the World Health Organization's 10th version of the International Statistical Classification of Disease and Related Health Problems (ICD-10). All diagnoses were ascertained at multidisciplinary team and endorsed by at least a consultant psychiatrist and a specialist in psychiatry in the clinical teams based in Tai Po Hospital.  Exclusion Criteria:  Significant neurologic history such as dementia, stroke, seizure, Parkinson's disease, multiple sclerosis; or History of brain neurosurgery; or Active abuse of alcohol or illicit substances; or Concurrent use of cognitive-enhancing medications e.g. acetylcholinesterase inhibitors; or Documented history of learning disability; or Implanted with pacemakers, intracranial electrodes, defibrillators, metal implants in head or neck area; or Pregnancy or breastfeeding; or Changes in medication regime over the two weeks before or during the study period (Brunoni, Ferrucci, et al., 2011).