入海口

estuary

to enter / to go into / to join / to become a member of / to confirm or agree with / abbr. for 入聲|入声[ru4 sheng1]

surname Hai

ocean / sea / CL:個|个[ge4],片[pian4] / great number of people or things / (dialect) numerous

Haikou prefecture-level city and capital of Hainan Province 海南省[Hai3 nan2 Sheng3]

estuary / coastal inlet / river mouth / seaport / see also 誇海口|夸海口[kua1 hai3 kou3]

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls