Shanghaiprosecuting agencies confirmed a continued rising trend of signed reports from the public in the past 12 months concerning abuses of power.

"We received a total of 1,872 reports of abuses of power through mail, phone calls and online channels from June 2012 to May this year, and the proportion of signed reports has continued rising in the past three years," Jin Hong, a spokeswoman for the Shanghai People’s Procuratorate, told China Daily on Monday.

Most abuses reported by whistle-blowers concern real estate, administrative charges and supplies purchasing, according to the authority.

The prosecuting agencies received 318 reports involving these areas in the first three months of this year.

This accounts for nearly 92 percent of first-time reports. Some reports are submitted repeatedly.

To better crack down on bribery,Shanghaiwas the first to implement a compulsory inquiry system in March.

This means any enterprise with a record of bribery will be banned from becoming a government supplier.