Pakistani passport. Hi I m living in china from last 4 years and I m going to graduate this year

Saqlain, you need to get a work Z type, so that you can work and live in China legally. You can try to convert your current visa to the work Z type at the exit and entry administration of the local PSB within China. If it can be done, you don't need to go back to your home country for that. You can contact the PSB for detailed information.