GD31/22 ZHUJIANG KOU GUNNERY EXERCISES IN AREA BOUNDED BY 21-44N 113-38E，21-44N 113-48E，21-54N 113-48E AND 21-54N 113-38E FROM 0200 UTC TO 0400 UTC AND 0730 UTC TO 0930 UTC 2 APR. AND IN AREA BOUNDED BY 21-42N 113-20E，21-42N 113-52E，21-08N 113-52E AND 21-08N 113-20E FROM 0730 UTC TO 0930 UTC 2 APR. ENTERING PROHIBITED GUANGDONG MSA CHINA