I have stayed China for almost two years and was overstay. now i want to go back. What Can I do?

An Atta, i have stay China for almost two years and i was overstay so i went in for exit visa but now i want to go back.I also have baby boy there, trading with the mother since i came to Ghana.We have two big stores, one kumasi and tarkwa , but i want to go and see them or bring my son bcak to Ghana.
Hop.e to hear from you
Thank you