

Hi i have a question .I have a work visa from my school but i quit my job after 2 months because they didn't give what is in my contract so i run away and i email them that i already went back home but the truth is i find another job in another city,but my problem now is my visa will finish soon and i want to go back to my country now using my visa that my first company gave me.my question is that is it possible for them to cancel my visa without my passport?because before they sent me email that they will cancel my visa.will i exit the border freely or will encounter some problems?im really afraid because i will go back home this february and im thinking that if they cancel my visa im already overstay in china?Hope you can give me advice on this matter.
thank you ..