Etymology
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From Mandarin 北部灣/北部湾 (Běibù Wān).
Proper noun
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the Gulf of Beibu
- Synonym of Gulf of Tonkin
[1974, Translations on People's Republic of China[1], →OCLC, page 112:The port of Pei-hai is situated in latitude 21°29' N., longitude 109°06' E., at the northeastern corner of the Gulf of Pei-pu in the eastern part of the Kwangsi Chuang Autonomous Region.]