苟富貴，勿相忘

don't forget your friends when you become rich

surname Gou

if / supposing / careless / negligent / temporarily

surname Fu

rich / abundant / wealthy

riches and honor

expensive / noble / precious / (honorific) your

do not

each other / one another / mutually / fret on the neck of a pipa 琵琶[pi2 pa5] (a fret on the soundboard is called a 品[pin3])

appearance / portrait / picture / government minister / (physics) phase / (literary) to appraise (esp. by scrutinizing physical features) / to read sb's fortune (by physiognomy, palmistry etc)

to forget / to overlook / to neglect