GUANGZHOU -- On China's Guangzhou International Biotech Island, a hub of companies on less than 2 sq. km of land, eateries are hard to find. But with a wave of the hand, workers can stop one of the driverless food trucks that deliver meals twice a day.
Scanning a bar code on the vehicle with a phone pays for the food, which costs 15 yuan to 20 yuan ($2.25 to $3).
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