GD225/21 SOUTH CHINA SEA UNDER WATER ENGINEERING WORK BY M/V “HAI YANG SHI YOU 708” IN AREA BOUNDED BY 21-28-07N 116-36-52E，21-28-07N 116-38-01E，21-27-02N 116-38-01E AND 21-27-02N 116-36-52E FROM 20 OCTOBER 2021 TO 20 JUNE 2022 SIGNAL LIGHTS AND SHAPES WILL BE EXHIBITED WIDE BERTH REQUESTED GUANGDONG MSA CHINA