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Where are the exclusive ticketing service departments of Guiyang China Southern Airlines, Air China, and China Eastern Airlines? What's the phone number?

Southbound: 1st Floor, Coal Building, No. 57 Beijing Road, Guiyang City 0851-95539 0851-6864773

National Bank: 1st Floor, Customs Building, No. 9 Zunyi Road, Guiyang City 0851-5810092 0851 -5499896 0851-5811222

Eastbound: 1st Floor, Chitianhua Building, No. 157 Huancheng North Road, Guiyang City, Guizhou Province 0851-6822288