Can you please advice how I can apply for the visa?

Hussian, then you should apply for a M type for you visit. Apart from your passport, you should provide:
1. invitation letter or letter of confirmation issued by duly authorized Chinese Unit.
2. invitation letter from the exhibition sponsor.
3. guarantee letter from your company.
4. your tax proof or your company's business license (copy version).
5. recent six months' bank statement.
6. round-trip air tickets and hotel booking are required if you come to China for the first time.