得鱼忘筌

dé yú wàng quán

lit. catch fish then forget the trap (idiom, from Zhuangzi 莊子|庄子[Zhuang1 zi3]); fig. to take help for granted

to obtain

fish (CL:條|条[tiao2],尾[wei3])

wàng

to forget

quán

bamboo fish trap