Inspectors have marched into 31 state organs and financial institutions and started a two-month internal corruption check.
Targets include Bank of China, Industrial and Commercial Bank of China, and Shanghai and Shenzhen stock exchanges, according to a statement issued on Tuesday.
The CPC regards the inspection, the third this year, as an effective way to uncover graft and improve working practice. Violations were publicized and some officials were fired following the previous inspections.
Inspectors from the Communist Party of China's Central Commission for Discipline Inspection accepts complaints and tip-offs in relation to the institutions being inspected.
