How to use the discount code?

shiyiming

I am now in the US, and I plan to take the sas base.
I also have the 3 digit code. I want to know how and where to use the discount code for the 50% off of the fee?
When I regester in the internet, there is no information for the code.
Thanks!

shiyiming

how did u get the code? can I share this code with my friend?

Thank u if any one knows.