Those punished in the first six months of this year were involved in 14,000 cases, the Communist Party of China (CPC) Central Commission for Discipline Inspection (CCDI) said in a report.
The figures represent a significant drop from last year, when more than 71,000 officials were reprimanded in more than 53,000 cases, signalling that the "eight-point rules" introduced on December 4, 2012 aimed at reducing bureaucracy, extravagance, and undesirable work habits may be taking effect, state-run Xinhua news agency reported.
In June alone, more than 4,300 officials were reprimanded in more than 3,100 cases, it said.
Violations include using official vehicles for personal errands, providing unauthorised subsidies, and holding extravagant receptions, weddings and funerals.