Chinese President Xi Jinping and his U.S. counterpart Donald Trump have had in-depth communication and achieved fruitful outcomes in their Beijing meeting, China's top diplomat Wang Yi said on Friday.

Wang made the remarks when he briefed the press on the meeting between Xi and Trump during Trump's state visit to China from Wednesday to Friday.

Their meeting included formal talks, a welcome banquet, a private meeting and a visit, Wang said, adding that the leaders spent nearly nine hours in interactions, with a tone of mutual respect, shared commitment to peace, and a willingness to cooperate.

The most important political consensus of the meeting, Wang said, is that the Chinese and U.S. presidents agreed on building a constructive bilateral relationship of strategic stability.

At the invitation of Trump, President Xi will pay a state visit to the United States in autumn this year.

Wang said the two major mechanisms of political diplomacy and economic and trade cooperation will continue to play their roles, steadily expanding the list of cooperation while narrowing down the list of problems.

Both heads of state highlighted the importance of promoting cultural and people-to-people exchanges. President Xi welcomed more young Americans to visit and study in China. President Trump also expressed his willingness to welcome Chinese students to study in the U.S..

Regarding the Taiwan question, Wang called it the most important issue in China-U.S. relations.

China hopes that the United States will take concrete actions to safeguard peace and stability across the Taiwan Strait, Wang said.

He stressed that the Taiwan question is China's internal affair, and China hopes that the United States will adhere to the one-China principle and the three China-U.S. joint communiques, and fulfill its due international obligations.

Wang also said that the economic and trade teams of the two nations will work to expand two-way trade under a reciprocal tariff reduction framework, and the two sides have also agreed to establish a trade council and an investment council and address each other's concerns over market access for agricultural products.

The two leaders also discussed international and regional hotspot issues.