不是瞎扯，我剛剛辦完的

不是瞎扯，一下第8條摘自http://www.china-embassy.org/visa/english/faq.htm

8. Can I use a certified envelope to mail my application to your office?
No problem. You can choose any envelope to mail your application to us. What we really care about is the return mail. We would like to advise you to use FedEx or Express Mail， because they are traceable.