Need advice / Help about X2 Visa

Hi i already have my admission letter from the school i enrolled in shanghai , And they just send it to my Gmail account and i printed it .Is it acceptable to the consular? or do i need to tell the school in shanghai to send to me the documents thru DHL? Im going to apply this week , coz i need to go to shanghai by the 2nd week of july!. What is also the best way to do so they can grant me? thanks in advance