BEIJING, Oct. 18 (Xinhua) -- Xi Jinping on Wednesday said China will replace the practice of "shuanggui" with detention as the reform of the national supervision system deepens.

Xi made the remarks at the opening of the 19th National Congress of the Communist Party of China (CPC).

Shuanggui is an intra-party disciplinary practice that requires a CPC member under investigation to cooperate with questioning at a designated place and a designated time. The practice is exercised by the Party's disciplinary officials.

Xi said China will set up supervisory commissions at the national, provincial, city, and county levels, which share offices and work together with the Party's disciplinary inspection commissions.

Supervisory commissions will be given responsibilities, powers, and means of investigation in accordance with law.

A national supervision law will be formulated.

Xi said this will ensure that supervision covers everyone in the public sector who exercises public power.