GX53/25 BEIBU BAY，TRAINING IN AREA BOUNDED BY THE LINES JOINING 21-18.17N 109-30.17E；21-11.98N 109-39.98E；21-18.28N 109-31.01E；19-36.60N 108-44.82E；18-10.90N 108-45.00E；18-10.90N 108-16.80E；18-43.65N 108-16.13E；18-48.22N 108-06.47E；18-35.65N 107-53.27E；18-38.68N 107-46.25E；19-13.65N 107-13.28E；20-19.82N 108-26.50E；20-48.30N 108-26.80E；20-48.30N 108-39.45E；20-40.35N 108-39.12E；20-38.02N 108-48.02E；20-46.65N 108-58.01E TIME FROM 212200 UTC TO 241200 UTC JUN. ENTERING PROHIBITED．GUANGXI MSA CHINA.