I want to get my diploma notarized by the China emb, when i call no answer and emails dont go thru.

Andrew, usually, the hot lines are not easy to get through. If you are in a hurry, you can go to the embassy in person and ask about the relevant information.
Of course, if you want to know the required documents for the diploma attestation, you can prepare the following materials:
1. Your passport and its copy
2. Your diploma notarized by the notary public and the ministry of foreign affairs of Kazakhstan (original and copy)
3. The application form
4. And other documents the consular officers consider necessary