479 is a three-letter- code belonging to ZH cargo airlines. The bill of lading starting with this number means that the cargoes are carried by ZH. To check and track the cargo, you can find their official website.
The three-letter-code of an airline is the only symbol representing its company. It is used on the air waybill of international air cargo transportation.
And "ZH" is the abbreviation of "SHENZHEN AIRLINES CO LTD"
SHENZHEN AIRLINES CO LTD is an air cargo company headquartered in Shenzhen Bao'an International Airport. Its international freight routes cover Southeast Asian countries: Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, Philippines and East Timor.
The departure airport in China is basically only Shenzhen Bao'an International Airport, and there are few flights departed from other international airports.
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