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There is a video camera built into the smart glasses, which were developed by LLVision Technology from Chaoyang in Beijing, and enables officials to spot criminals in their surroundings . In order to speed up the system, it is connected with a portable device where a facial database is stored. The glasses are able to recognize a person from the 10,000 archived faces in just 100 ms.

Using this method, officials can filter out individuals, for example, who have left their place of residence under a false identity, in spite of travel restrictions. This makes the mobile glasses/cameras significantly faster and much more precise than fixed surveillance cameras with a similar function, such as those being tested by the German police and Ministry of the Interior at Berlin Südkreuz train station since last year. In Germany, this has already led to heavy criticism ; in China, human rights activists fear that surveillance could also be used to target dissidents.