The Chongqing municipal police bureau is looking to recruit 150 volunteers to keep an eye on the city's more than 30,000 police officers.

The task will allow the "grassroots inspectors" to directly challenge corruption in the police system and monitor the entire law enforcement system.

The bureau is now accepting applications from healthy men under the age 60 and women under the age of 55, who are residents of Chongqing. The last day to apply is June. 9th.

The recruitment drive comes after a string of corruption cases that resulted in a number of senior officers being thrown in prison for protecting criminal gangs.