hi we need to get visa from sudia to china we want know the requirament

Documents required are as follows:
(1) A passport and its copy, it should be valid for at least six months with enough blank visa page;
(2) A set of completely-filled application forms;
(3) Two recent color photos;
(4) A Saudi resident card or its copy;
(5) An introduction letter from the work unit in Saudi Arabia, enclose a copy of the company license.
Besides, an invitation letter of the unit in China is required if you visit China for business purpose.