Considering the amount of money the Chinese have loaned us, he should be worried:

BEIJING — The Chinese prime minister, Wen Jiabao, spoke in unusually blunt terms on Friday about the “safety” of China’s $1 trillion investment in American government debt, the world’s largest such holding, and urged the Obama administration to offer assurances that the securities would maintain their value.

Speaking ahead of a meeting of finance ministers and bankers this weekend near London to lay the groundwork for next month’s Group of 20 summit meeting of the nations with the 20 largest economies, Mr. Wen said that he was “worried” about China’s holdings of United States Treasury bonds and other debt, and that China was watching economic developments in the United States closely.

As the financial crisis has unfolded, China has become increasingly vocal about what it perceives as Washington’s mismanagement of the global economy and financial system, joining a chorus of foreign critics of unbridled American capitalism. On Thursday, for example, France and Germany rebuffed American calls to coordinate a global stimulus package at the G-20 meeting, saying financial regulation should come first.