hello my name is Amina I'm from morocco and i would study in china

Amina, you should first find a school in PRC to enroll you, and then you can get the admission letter and JW201 or 202 form.
The next step is to prepare the required documents for student X type including your passport and its copy, the completed application form attached with a passport-style photo, and recent bank statement as well other documents the consular officers consider necessary.
Afterwards, submit the application to the embassy of PRC to apply for it.