what should documents i need to submit for visa for company official training in China?

You need an F (business) visa and the requirements are:
1. passport valid for at least 6 months and with at least two blank pages and photocopy of the passport's data page;
2. completed visa application form V2011A;
3. "Invitation Letter of Duly Authorized Unit" or "Confirmation Letter of Invitation" or invitation letter from the legally registered company in China;
4. covering letter from your company with the details of the visiting purpose;
5. other deemed necessary documents by the embassy.