this is a long article but I’ve excerpted the part referring to Pakistan and China:
http://www.reuters.com/newsArticle.jhtml?type=topNews&storyID=1876414
**U.S., Chinese Defense Officials in High-Level Talks **
He said Beijing had made various pledges that it would halt arms proliferation but “had only begun to deliver” so the Americans would “stress how important it is for them to complete the promise of delivering what they have promised.”
This includes going farther to implement new export controls and clear up questions about China’s transfer of missile technology to Pakistan, the senior official said.