To save you some time clicking on the links, here is the general idea towards applying for your scholarship.
Chinese Government scholarship:
This is usually a full scholarship offered by the government and is extremely limited and rare to get. You need to call the Chinese embassy in your country to inquire about the details of acquiring it.
You most likely will need to apply and enroll in school prior to applying for these scholarships, since most of these scholarships are offered at different times of the year. Many scholarships are offered annually, so a lot of it could depend on your academic performances in school.
Summary: It’s recommended for you to simply enroll in school first, and then apply for scholarships when you get here.