Li wrapped up his three-day visit on Friday after meeting with officials from the US Department of the Treasury, the Department of Commerce and the Office of the US Trade Representative, according to a statement from the Chinese commerce ministry on Saturday.
He also held talks with representatives from the US-China Business Council, the US Chamber of Commerce and several US companies.
China and the US are preparing for their fourth round of trade talks, to be held around November when the 90-day truce deal expires and before a potential visit by US President Donald Trump to China.
The two sides “exchanged views on bilateral economic and trade relations and the implementation of prior consensus reached in Sino-American trade negotiations”, the ministry said.