My son ( 8 months old ) born in china and now he have dual nationality which are china & malaysia. I'm malaysian and my wife is china citizen, we married in malaysia and my son was born in china. Now we are stay in china - Nanjing. My problem is i can't bring my son back to malaysia by using his emergency cerfiticate issued from GuangZhou Malaysia Embassy cuz china goverment not issued me an exit permit travel to malaysia. If i want an exit permit for my son travel to malaysia i have to cancel my son china citizenship. What are the procedures if i want give up my son china citizenship?

Plz help....