Can I "add" an additional entry onto my X2 Student Visa - while in Shanghai?

I am currently studying full time in Shanghai on a X2 Student Type (single entry).

I have been in Shanghai for approximately 60 days of my 180 day, and I need to urgently return home as a close family member is in hospital and will likely pass away in the coming days.

I am unsure if I can “add” another entry to my existing single entry X2 Type, to allow me to re-entre China. Or whether I will need to reapply for another X2 Student Type whilst I am in my home country?

Thank you for your assistance, I really appreciate your help.