The Chinese city of Chongqing is teaming up with electronics giant Cisco, Hewlett-Packard and others to gear up for one of “the largest and most sophisticated video-surveillance projects of its kind.” Ever since the Tiananmen Square demonstrations in 1989, U.S. companies have been prohibited to export “crime-control” products to China and other hard-line governments. But, it turns out, technologies like cameras and filtering software sidesteps this ruling.