Beijing has initiated a first-class patrol program which includes over 7000 policemen and more than 3000 auxiliary police mobilized into vehicle patrols, bike patrols, foot patrols, and dog patrols, according to Beijing Evening News on September 23rd, 2009.
Hundreds of Beijing entrances are strictly controlled. Suspicious persons, vehicles, and dangerous goods are all checked, one by one. Beijing police require residents to carry their IDs with them and to cooperate with police inquiries and checks.
Source: Beijing Evening News, September 23, 2009