Applying for X1 visa

Hi. I'm a student in Jiangsu University. I haven't finished my degree yet but my visa is going to expire on 31 July 2019. I have applied for visa extension but immigration office refused to give my passport back before 3 weeks. I can't keep my passport that long because I have family affair that I have to travel with my passport. The immigration officer give me one solution that I can apply for X1 visa again, but my JW has already expired. Do you have any solution for that? What are the document needed to apply for X1'visa?