WASHINGTON — China has become shrill in its criticism of the fiscal train wreck in the United States, arguing that the answer to a potential government default is to begin creating a “de-Americanized world.” Beijing’s alarm is understandable, given that it is the world’s largest investor in American public debt, with at least $1.3 trillion in holdings.

But China does not have many options beyond wringing its hands. Despite its efforts to steer its economy away from exports and toward domestic demand, China generates billions of dollars of excess cash that it needs to park somewhere. And for all the chaos in Washington, Treasury bonds remain a safer investment than most of the alternatives.

That dependence may help explain the stridency of a recent commentary published by the official Xinhua news agency. It called for the replacement of the dollar as the world’s reserve currency “so that the international community could permanently stay away from the spillover of the intensifying domestic political turmoil in the United States.”

“As U.S. politicians of both political parties are still shuffling back and forth between the White House and the Capitol Hill without striking a viable deal to bring normality to the body politic they brag about,” the news agency said, “it is perhaps a good time for the befuddled world to start considering building a de-Americanized world.”