i am a jamaican citizen and i would like to travel to a china sourcing fair in October.

Hi, for trade fair, you have to provide following documents:
1. Original passport which has more than 6 months left before it expires from the date of application and sufficient blank pages.
2. One completed Application Form V.2011A with a recently-taken passport photo stuck on it.
3. A Letter of invitation from a company or institution, or an business letter from the employer of the applicant , or Certificate of the company owned by the applicant.
4. Round-trip ticket and hotel reservation.