China threatens 'nuclear option' of dollar sales
By Ambrose Evans-Pritchard
Last Updated: 1:48am BST 08/08/2007
The Chinese government has begun a concerted campaign of economic threats against the United States, hinting that it may liquidate its vast holding of US treasuries if Washington imposes trade sanctions to force a yuan revaluation.
Two officials at leading Communist Party bodies have given interviews in recent days warning - for the first time - that Beijing may use its $1.33 trillion (£658bn) of foreign reserves as a political weapon to counter pressure from the US Congress. Shifts in Chinese policy are often announced through key think tanks and academies.
http://www.telegraph.co.uk/money/main.jhtml?xml=/money/2007/08/07/bcnchina107a.xml
I don't think the chinese would be stupid enough to collapse the US dollar along with a large chunk of its export market but the escalating tension between them and the US is of concern IMO.