United States Secretary of State Hillary Clinton said the US and China can pull the world out of economic crisis by working together.
Mrs Clinton, speaking during a trip to China on Saturday, also said she hoped a G20 summit in London in April would yield agreement on cross border capital flows.
China, with foreign exchange reserves of about $US2 trillion, is the world's largest holder of US government debt.
"I appreciate greatly the Chinese government's continuing confidence in United States Treasuries. I think that's a well grounded confidence," Clinton said at a news conference with Chinese Foreign Minister Yang Jiechi.
"We have every reason to believe that the United States and China will recover and that together we will help to lead the world recovery."
Mrs Clinton's visit to China is the fourth and final leg of a tour of Asia that has also taken her to South Korea, Indonesia and Japan. It is her first trip abroad as secretary of state.
Speaking earlier, Mrs Clinton said the United States and China had to also work together in dealing with climate change as well as security threats posed by North Korea.
On Friday, Mrs Clinton said Washington would press China on human rights but added that this would not keep them from working together on a range of issues such as the financial crisis.
The online edition of Xinhua news agency quoted Yang as saying China was "willing to conduct positive dialogue on human rights issues with the US side".
Mrs Clinton will also meet President Hu Jintao and Premier Wen Jiabao on Saturday.