The U.S and Russia or U.S.S.R never lost a war since the 20th century. They might have retreated from countries like Vietnam and Afghanistan respectively. But no one could ever take the war to their homeland (except the Nazi's who invaded U.S.S.R). Unless and until anyone take the war to their home hand and threaten their nation security nothing is gonna happen.
China might be a giant, but they still don't posses the capability to take to war to U.S home land whereas the U.S can do that easily against China, a hard truth that PRC recognizes.
At present only U.S and Russia possess the capability against each other, and U.S surely have the edge over Russia in that case. Therefor to think that U.S and Russia will go to a war is nothing more than being ridiculous I guess.
Are you kidding, China is loyal to Pakistan ??
Moreover national interests come before loyalty or friendship. I'm sad that you guy's never learn from history. Where was China in 1965, 1971 or 1999 ??
Also it was the Chinese intelligence who wiretapped Mr. Musharrafs phone conversation and made it public. Still you expect them to be loyal ?? Well good for Pakistan.