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BRIEF-China Southern Airlines' Passenger, Mail and Cargo Up In March

April 15 (Reuters) - China Southern Airlines Co Ltd :

* SAYS MARCH PASSENGER CARRIED UP 4.1 PERCENT Y/Y, MAIL AND CARGO UP 2.6 PERCENT Y/Y Source text in Chinese: https://bit.ly/2ZdPMA0 Further company coverage: (Reporting by Hong Kong newsroom)