YELLOW SEAM/V RONG HENG TRIAL VOYAGE FROM 080000UTC TO 090900UTC JUN. IN AREA BOUNDED BY THE LINES JOINING. 37-35N 123-15E; 37-35N 123-25E; 37-20N 123-25E; 37-20N 123-15E。 CAUTION ADVISED. SHANDONG MSA CHINA