This gulf is bordered by Luichow Peninsula & Hainan Island on the east & Vietnam on the west
[DOC] [TLE] East Sea file: Physical features - Part 2 - News VietNamNet [PAR] Jun 17, 2014 ... Vietnam's sea areas, continental shelf and islands in the East Sea cover many ... 
East Sea, Hoang Sa, Truong Sa, Gulf of Tonkin ...