Hello guys! Wanted to ask if one(foreigner) can use his/her Chinese Diploma overseas...  I heard that you gotta first take it to Notarial and Embassy in order to able to use it overseas...
  Has any of you had the Experience?
Much appreciated! 

Why not? Once you get a diploma from a foreign country, you need to get it notarized, after that, you go to the foreign affairs department for authentication.