WASHINGTON - Experts including World Bank's Managing Director Sri Mulyani Indrawati said on Tuesday that as the two engines of the global economy, China and the United States still have huge room to tap for closer economic and policy ties in a wide range of arenas.

The world's two largest economies can further cooperate with each on fiscal and monetary policy coordination and on a string of structural and macro-policy issues including governance and climate change, she told Xinhua on the sidelines of a one-day symposium named "Global China Summit" organized by Washington Post Live on Tuesday.

China has achieved tremendous economic progress in past decades and the United States can find new cooperation room with China in infrastructure projects and other sectors, David Rubenstein, co-founder and Managing Director of The Carlyle Group, said at a panel discussion of the event taking place in Washington DC.

Rubenstein and several other experts held that the United States should make it easier for Chinese investors to do business to facilitate Chinese investments to America as the country is endeavoring to boost its economy and reduce unemployment.