From Xinhua (link):
China’s booming special economic zone of Shenzhen leads the country in putting up cyber police to curb on-line crimes and the spread of hazardous information.
The local police authorities said since the cyber police appeared in January, the amount of hazardous information at the city’s major portal websites have reduced by 60 percent.
Since January, cyber police “Jingjing”, a cyber policeman, and “Chacha”, a cyber policewoman, have performed their duties at major portal websites. Both had cartoon icons on Internet.
See also Online Police to Patrol More Cities in China by CRI