old-school tie校友领带
the old school tie学校所认识的人脉;这种老校情结
N-SING（单数型名词） When people talk about the old school tie, they are referring to the situation in which people who attended the same school or college use their positions of influence to help each other. 校友间互相关照 [英国英语]['the' N]
Of course, the old school tie has been a help.
校友关系当然是帮了忙的。