same as 渤海, Bohai Sea between Liaoning and Shandong; Gulf of Zhili or Chihli

strokes 12
strokes after radical 9
渤海 渤海 bo2 hai3
Bohai Sea, or Bo Hai, between Liaoning and Shandong; Parhae, Korean kingdom in Manchuria and Siberia 698-926

渤海湾 渤海灣 bo2 hai3 wan1
Bohai Bay

渤澥桑田 渤澥桑田 bo2 xie4 sang1 tian2
lit. blue seas where once was mulberry fields (idiom, from 史記|史记, Record of the Grand Historian); time brings great changes; life's vicissitudes

环渤海湾地区 環渤海灣地區 huan2 bo2 hai3 wan1 di4 qu1
Bohai Economic Rim (economic region including Beijing, Tianjin, Hebei, Liaoning and Shandong)