海内存知己，天涯若比邻

close friend in a distant land, far-flung realms as next door / close in spirit although far away

surname Hai

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

the whole world / throughout the land / everything under the sun

inside / inner / internal / within / interior

internal storage / computer memory / random access memory (RAM)

to exist / to deposit / to store / to keep / to survive

to know / to be aware

to know oneself / to be intimate or close / intimate friend

self / oneself / sixth of the ten Heavenly Stems 十天干[shi2 tian1 gan1] / sixth in order / letter "F" or Roman "VI" in list "A, B, C", or "I, II, III" etc / hexa

day / sky / heaven

the other end of the world / a faraway place

border / horizon / shore

to seem / like / as / if

Belgium / Belgian / abbr. for 比利時|比利时[Bi3 li4 shi2]

euphemistic variant of 屄[bi1]

to compare / (followed by a noun and adjective) more {adj.} than {noun} / ratio / to gesture / (Taiwan pr. [bi4] in some compounds derived from Classical Chinese)

far-flung realms as next door (idiom) / close in spirit although far away

neighbor / next-door neighbor / near / next to

neighbor / adjacent / close to

variant of 鄰|邻[lin2]