China has the capability to reverse engineer, improve and manufacture anything you sell them. You will just be making China and its clients stronger. BTW - in case you have forgotten, Iran is one of China's weapons clients. Note also that Iran has improved several Chinese weapons designs and fed that info back to China. As I noted in another post, Israel can NOT maintain weapons superiority any longer, so it is time for talk instead of war.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Gates says Washington to sell smart bombs to Saudi Arabia