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What color are the clothes of the staff of Guangzhou Wharf recruiting trolleys?

Blue or gray. According to official website of Guangzhou Baiyun International Airport, the staff recruiting trolleys in Guangzhou Terminal should wear comfortable, durable and easy-to-clean work clothes. The color of work clothes is blue or gray, and the color of work clothes in blue or gray can also make it easier for passengers to identify tram employees and facilitate communication and cooperation.