| SHENZHEN, China, Aug. 9 — At least 20,000 police surveillance cameras are being installed along streets here in southern China and will soon be guided by sophisticated computer software from an American-financed company to recognize automatically the faces of police suspects and detect unusual activity. |
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In China, a High-Tech Plan to Track People

Ariana Lindquist for The New York Times
Law enforcement technology is being introduced to monitor people, like these citizens from Hong Kong, crossing into Shenzhen
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