YELLOW SEA GUN FIRING IN AREA BOUNDED BY THE LINES JIONING FROM 270500UTC TO 280800UTC SEP. 36-51.87N 122-25.00E; 36-47.83N 122-26.25E; 36-47.83N 122-22.25E; 36-51.67N 122-23.17E,ENTERING PROHIBITED. SHANDONG MSA CHINA.