Tax information mail not replied

I’ve sent a mail to taxinfo@envato.com about taxing but didn’t get reply for the last 4-5 days.
So here is what I’ve wrote:

I am a Turkish citizen (non-US) currently studying in P.R. China with a residence permit.
All Turkish citizens automatically have tax numbers since it is the same as our National ID number.
Question is, when I’m filling the W8 form,

  • Do I use my Turkish tax number (which is same as my Turkish national ID number) or should I get a foreigner’s tax number in my country of residence (P.R. China) and type that in W8?

  • My official address is in China right now and I have residence permit, so does that make me “a resident of P.R. China” and thus should I choose P.R. China in the “Claim of Tax Treaty Benefits” section and choose II(2) and 10% respectively?

  • Since treaty of P.R. China and US doesn’t make me exempt from tax but rather give a reduced tax rate, should I still check the last box where is says “For broker transactions or barter exchanges, the beneficial owner is an exempt foreign person as defined in the instructions”?

Thank you for your help.