Looks like China has finally woken up to their predicament. It's not a question of if they do something about it, but when.

(Bloomberg) -- China, the U.S. government’s largest creditor, is “worried” about its holdings of Treasuries and wants assurances that the investment is safe, Premier Wen Jiabao said.

“We have lent a huge amount of money to the United States,” Wen said at a press briefing in Beijing today after the annual meeting of the legislature. “Of course we are concerned about the safety of our assets. To be honest, I am a little bit worried. I request the U.S. to maintain its good credit, to honor its promises and to guarantee the safety of China’s assets.”