你能列一下你递交的材料吗？Maybe I can give you some advice according to my experience.
these are the docs
invitation letter from the conference
status letter fm NUS
supporting letter from supervisor
bank statment
student pass (copy)
Many thanks for your kind help!
status letter fm NUS
supporting letter from supervisor
bank statment
student pass (copy)
Many thanks for your kind help!
Huasing Association 1999 - 2013