金蘭之交

intimate friendship (idiom)

surname Jin / surname Kim (Korean) / Jurchen Jin dynasty (1115-1234)

gold / chemical element Au / generic term for lustrous and ductile metals / money / golden / highly respected / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

profound friendship / sworn brotherhood

surname Lan / abbr. for Lanzhou 蘭州|兰州[Lan2 zhou1], Gansu

orchid (蘭花|兰花 Cymbidium goeringii) / fragrant thoroughwort (蘭草|兰草 Eupatorium fortunei) / lily magnolia (木蘭|木兰)

(possessive particle, literary equivalent of 的[de5]) / him / her / it

to hand over / to deliver / to pay (money) / to turn over / to make friends / to intersect (lines) / variant of 跤[jiao1]