以下原文摘自NUS官网，NTU官网上也有类似言语：
The University has not engaged any external agencies to undertake graduate student recruitment on its behalf. Candidates interested in our graduate programmes are advised to apply directly to the University and not through any agents. Candidates who apply through agents will not have any added advantage in gaining admission and the University reserves the right to reject such applications without giving reasons.
如果你英文不差的话应该明白什么意思吧：
申请者需要自己申请...通过中介申请也不会有任何好处...学校可以无理由拒绝这样的申请者...
愿意冒险找中介的话也随你，反正我觉得没什么必要。其实拿自己的成绩上网申请就是了，整个步骤非常容易并不繁琐，而且申请费也很便宜。
对于申请者的最低要求在官网上也写得很明白。不过有些条件不会明说，比如211/985之类的。学校不好也可以申请，只不过几乎没机会录取而已。
还有问题的话欢迎追问
