GD133/21 SOUTH CHINA SEA M/V“MENG NA GONG ZHU”CARRY OUT EQUIPMENT TESTING IN AREA BOUNDED BY 21-27-00N 117-09-00E，21-27-00N 117-09-18E，21-30-00N 117-09-18E AND 21-30-00N 117-09-00E FROM 25 JUN. TO 4 JUL. DAY AND NIGHT SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED WIDE BERTH REQUESTED GUANGDONG MSA CHINA