if anyone thinks (no posts this thread yet) the Chinese would hurt themselves by selling treasuries and hurting market value the vast issuance has been short term paper,bills and notes as opposed to bonds. They can dump the longer end and simply let the shorter paper mature which would be a pretty painless way for them to lower exposure.
Make no mistake, China now has the ability to squeeze the U.S. then relax, then squeeze again to cause just enough pain in an effort to alter U.S. policy particularly when it comes to China and the areas surrounding China.