BEIJING, July 23  -- A senior official with the Communist Party of China (CPC) has called for high standards and strict requirements in the implementation of the Party's "mass-line" campaign.

Liu Yunshan, a member of the Standing Committee of the Political Bureau of the CPC Central Committee, made the remarks during seminars held recently in Xining, capital city of northwest China's Qinghai Province, and Shanghai.

He told CPC officials to shun formality and superficiality in carrying out the campaign, and be committed to solve problems to win the people's trust.

Liu ordered the clamping down on improper practices including construction of extravagant government buildings, officials' visits to high-end private clubs, extravagant training sessions, as well as the problem of "naked officials", a term used to describe those whose spouse and children have emigrated overseas.

The "mass-line" campaign was launched in June last year by Chinese leaders to boost ties between CPC officials and members of the public, while cleaning up undesirable work styles such as formalism, bureaucracy, hedonism and extravagance.

Liu, head of the campaign team, said the campaign is at a crucial stage as it will start to target officials and CPC members at the grassroots level.

The campaign focused on central and provincial-level departments in the first phase and lower-level offices and leaderships in the second stage.

Liu also called for initiatives to get more of the public to participate in the campaign.

During his trip in Shanghai, Liu also visited local communities, enterprises and Shanghai's pilot free trade zone.