Zhōng guó hǎi guān
Chinese customs (i.e. border police)
Zhōng guó Hǎi yáng Shí yóu Zǒng gōng sī
CNOOC
China National Offshore Oil Corporation
Zhōng guó hǎi shì jú
PRC Maritime Safety Agency
Zhōng guó Hǎi
the China Seas (the seas of the Western Pacific Ocean, around China: Bohai Sea, Yellow Sea, East China Sea, South China Sea)