The cartoon image of Chaoyang residents, with the Chinese words reading "Love Beijing, love Chaoyang, I contribute to safety."

Beijing's Chaoyang district: World's 'fifth largest intelligence agency'

How good is BJCYQZ at collecting intelligence? Who are they?

Besides drug control, residents in Chaoyang have also tipped the police about celebrities paying for sex resulting in the arrest of famous micro-blogger Charles Xue (whose nickname is Xuemanzi) and well-known Chinese actor Huang Haibo.

Clues provided by residents in Chaoyang have also proved valuable in helping police crack cases about illegal constructions, fire hazards and unlicensed taxis, and so on and so forth.

"I believe BJCYQZ refers to ordinary people who believe in justice, abide by the law and have the courage to fight against crime," said Li Jiangbo, the deputy-director of the drug control team of the district police station.

Apart from the permanent residents in communities, BJCYQZ also include security staff at companies and entities, college students and various volunteers who are able to cover the corners that are beyond the reach of community police officers, according to Han Chunxi, deputy-director of the population management division of the district police station.

BJCYQZ is a newly emerging security force consisting of common people, and it now involves about 120,000 people, said Han.