how many days will my VISA be issued by chinese embassy?And what are the requirements,fees and process?

For applying, you need to handle your admission letter, JW 201/JW202 Form, your application form with recent taken photo, passport, mark sheet/diploma and Physical Examination Record attested by the Ministry of Foreign Affairs of Pakistan.

You can apply for a X type. Usually, after four working days, you will get it and no application fee is charged.