(to give) credit where credit's due idiom
该赞扬的就赞扬
an expression that means that you should praise someone who deserves it, although you might dislike some things about them
I don't especially like the woman but, credit where credit's due, she's very efficient. 我不是特别喜欢那个女人，不过，该说好的就说好，她办事效率很高。