If China can see risks to a decline in the dollar then we can't be out to lunch for thinking the same thing here.
This makes no sense at all. It's foreign countries that need to increase spending to boost China's exports, right? China may be just wasting money on adding to what is already an excess of manufacturing capacity
We know how the US gov fudges GDP in the US; I expect China's reported values to be overly optimistic too.

China 'worried' about US Treasury holdings
http://news.yahoo.com/s/ap/20090313/ap_on_bi_ge/as_china_us_economy