Please prepare the below documents:
1. your passport
2. Truly completed and signed Visa Application Form
3. Invitation letter (if visit for the first time), If you cannot provide an invitation letter, please provide a visa recommendation letter from the applicant's employing company, organization, etc.
4. Other additional documents required according to the merits of each applicant, e.g. bank statements, round-trip air tickets booking, etc.
Then submit them to the China embassy in person or entrust someone else, such as a travel agency.

it takes 4 working days for visa processing.