Membership gifts have been used to avoid detection of bribery

China's top anti-graft official Wang Qishan on Monday urged disciplinary and supervisory staff to return all membership cards gifted by others.

The chief of the Party's Central Commission for Discipline Inspection said during a videophone meeting that the campaign aims to send a signal to the Party and society that anti-graft officials are taking real action to improve their working style as required by the new leadership in December.