US President Barack Obama (L) speaks to reporters in the Oval Office after meeting with Brazil's President Ignacio 'Lula' Da Silva at the White House in Washington, March 14, 2009. [Xinhua]

U.S. President Barack Obama assured on Saturday that China can have confidence in the American economy after meeting with his Brazilian counterpart Luiz Inacio Lula da Silva at the White House.

"Not just the Chinese government, but every investor can have absolute confidence in the soundness of investments in the United States," Obama said.

"There is a reason why even in the midst of this economic crisis you have seen actual increases in investment flows here in the U.S.," he said.

U.S. President Barack Obama listens to reporters in the Oval Office after meeting with Brazil's President Ignacio 'Lula' Da Silva at the White House in Washington, March 14, 2009.[Xinhua]

Obama also noted the U.S. will push for stricter regulation of the financial industry "front and center" at the upcoming G20 summit in London, playing down suggestions of a rift between the Europe and the United States over whether more emphasis should be placed on stimulus or financial regulatory reform.

Chinese Premier Wen Jiabao said earlier Friday he is "a little bit worried" about the safety of Chinese assets in the United States, urging the U.S. government to ensure the security of those assets.

"We lent such huge fund to the United States and of course we're concerned about the security of our assets and, to speak truthfully, I am a little bit worried," Wen told a press conference after the close of the annual session of the National People's Congress (NPC) and the National Committee of the Chinese People's Political Consultative Conference (CPPCC).

China has invested its huge foreign exchange reserves in low-risk but low-yield assets, such as U.S. government bonds, to play it safe.

According to the U.S. Treasury, China held US$681.9 billion worth of U.S. government bonds as of November.

"China is indeed the largest creditor of the United States, which is the world's biggest economy. We are extremely interested in developments in the U.S. economy," said Wen, adding that he is expecting the effect of the measures taken by the U.S. government to counter the global financial crisis.

Asked to react to Wen's concern, Lawrence Summers, director of the U.S. National Economic Council, noted on Friday that U.S. would be "sound stewards of the money we invest."

"This is a commitment that the president has made very clear --we need to be sound stewards of the money we invest," said Summers in a speech at the Brookings Institution, a leading think tank in the United States.