Over 170,000 cars purchased and used by government officials have been deemed to be unnecessary or "too luxurious" for official use under a campaign to regulate the use of government cars, the top anti-graft official of the Communist Party of China (CPC) said on Friday.

The next stage of the campaign will consist of correcting the violations and intensifying daily supervision, He Guoqiang, head of the CPC Central Commission for Discipline Inspection (CCDI), said during an anti-corruption conference.

China launched a campaign in May to regulate the use of public funds for government vehicles in order to reduce unnecessary public spending.

Another campaign targeted at corruption in the construction industry resulted in 38,000 reports of violations and over 19,000 investigations, He said at the conference. A third campaign to cut public spending on unnecessary meetings and official banquets has saved taxpayers about 840 million yuan, He said.

He called on the leaders of the campaigns to work on coordinating their efforts and focusing on major areas of the campaigns.