Should I apply on company's behalf or apply for personal visa for visiting "China Import and Export Fair (Canton Fair)?

You should apply Business visa for yourself rather than company, you go to attend the Canton Fair and need the visa. But your company should prepare the below documents to help you to get Business Visa to China,

1. Original invitation or confirmation letter (used to be called Visa Notice) from the Guangzhou foreign affairs office

2. Invitation letter from Canton Fair organization;

3. A supporting letter from your company and your company Registration Certificate (photocopy);

5. company's tax certificate (photocopy);

6. company's bank statement