Fitch 21, the international rating agency, issued a warning that the US government was likely to fail to raise the bill.

Fitch's Asia Pacific sovereign rating officer Andrew Kohon said 21: "if the US debt ceiling can not be raised before August 2nd, Fitch will place the US rating on the negative watch list."

And the US Congressmen, who have been trying to stop us debt rising, have shown their determination to win 20 days. They are determined to make substantial progress on the issue of debt ceiling this week, so as to ensure the credit rating of AAA in the US.

Earlier, the US Treasury issued a warning that if Congress could not raise the debt ceiling of $14 trillion and 300 billion by August 2nd, the US could default on its debt, and once the United States appeared.

In recent years, the ratio of US budget deficit to GDP has been hovering at the highest level since World War II.

Overseas media reported that as of September 30th this fiscal year, the deficit will be as high as 1 trillion and 400 billion dollars.

Overseas media reports say that a rough agreement will be issued before the end of this week on the debt ceiling.

It is reported that vice president Biden will chair a meeting from 21 to 23, focusing on the issue.

After Fitch's warnings, the US dollar index declined slightly in 21 Asian and European trading hours.

At 19:50 on 21 Beijing time, the US dollar index was 74.78, or 0.31%.