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Bike couriers of a food delivery service attend a training course on traffic rules and safety lectured by a traffic police officer in Chengdu, southwest China's Sichuan Province, June 24, 2018. (Xinhua/Jiang Hongjing)
Bike couriers of a food delivery service attend a training course on traffic rules and safety lectured by a traffic police officer in Chengdu, southwest China's Sichuan Province, June 24, 2018. (Xinhua/Jiang Hongjing)