drive a hard bargainv exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
(be tough negotiator)
进行一场艰苦的谈判 jìn xíng yì chǎng jiān kǔ de tán pàn
The shopkeeper drove a hard bargain, but we eventually agreed on a price for the vase.