打交道

come into (or make)contact with;have dealings with
不同中国～，实际上只能把自己排除在这个广大的市场之外。To refuse to have dealings with China was in fact to bar oneself from a huge market./穷朋友同穷朋友～打得来。We poor friends find it easy to get along with each other./希望你们同他们～时脑子里要有根弦。I hope you will be on your guard when dealing with them.