海内

hǎi nèi the whole world; throughout the land; everything under the sun

存

cún to exist; to deposit; to store; to keep; to survive

知己

zhī jǐ to know oneself; to be intimate or close; intimate friend

， 天涯若比邻

tiān yá ruò bǐ lín far-flung realms as next door (idiom); close in spirit although far away