他乡遇故知

meeting an old friend in a foreign place (idiom)

he; him (used for either sex when the sex is unknown or unimportant) / (used before sb's name for emphasis) / (used as a meaningless mock object) / (literary) other

foreign land / away from one's native place

country or countryside / native place / home village or town / township (PRC administrative unit)

surname Yu

to meet / to encounter / to treat / to receive / opportunity / chance

happening / instance / reason / cause / intentional / former / old / friend / therefore / hence / (of people) to die, dead

a close friend over many years

to know / to be aware