what are the requirements to get a visa to China?

For trade purpose to China, you need to apply for a Business visa (F) from Chinese embassy in Jordan. The requirements for F visa are as follows:
1.Your valid & actual passport which must have at least six (6) months of remaining validity with at least one blank visa page in it.
2.One completed Visa Application Form with one passport photo (black & white or color is acceptable).
3.An invitation letter from the host company or unit in China, or a letter from your company.