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BRIEF-China Southern Airlines Signs Supplemental Deal With Boeing

Feb 28 (Reuters) - China Southern Airlines Co Ltd :

* SAYS IT SIGNS SUPPLEMENTAL DEAL WITH BOEING TO SWITCH TWO B777-300ER AIRPLANES TO TWO B777F CARGO PLANES Source text in Chinese: https://bit.ly/2VsTQcZ Further company coverage: (Reporting by Hong Kong newsroom)