GX30/25 BEIBU BAY,EXERCISES IN AREA BOUNDED BY THE LINES JOINING 21-22.22N 109-27.55E;21-17.98N 109-39.92E;21-13.55N 109-38.08E;21-10.83N 109-33.45E;21-12.88N 109-27.53E;21-17.75N 109-25.82E FROM 202200 UTC TO 231200 UTC APR. ENTERING PROHIBITED.GUANGXI MSA CHINA.