A surveillance camera is seen in Pudong, Shanghai in this file photo taken on April 16, 2010. The municipality will install 50,000 such cameras in five years to better ensure safety for the public, according to the first China Security and Surveillance Forum held in Shanghai May 27, 2011. So far, the city has already had 50,000 such cameras. [Photo/Asianewsphoto] Related story: Shanghai police employ 4,000 CCTV watchers |