那如果只是国大的学生没有新加坡的亲戚也还没有找工作是不是这个PR申请信基本没什么用的了。。？
in your case
yes, the invitation letter is inviting you to apply for PR if you have fulfilled the application requirements (in your case, after you secure a full-time job offer), it is useless if you don't fulfill the basic requirements
Huasing Association 1999 - 2013