NEW : Geithner emphasizes expanding trade and investment . While China has called on the United States to loosen export regulations , Washington has said that Chinese currency controls keep the yuan undervalued and give Chinese exporters an unfair advantage at a time when the global economy is suffering . OBAMA : China says its large imports of Iranian oil have nothing to do with Tehran 's nuclear program . Officials also talk about improving economic ties between China and the United States .
NEW : Geithner emphasizes expanding trade and investment . OBAMA : China says its large imports of Iranian oil have nothing to do with Tehran 's nuclear program . Officials also talk about improving economic ties between China and the United States .