They also said the United States would like to maintain dialogue with China on human rights and agreed that the two sides should properly handle sensitive issues concerning bilateral ties.

Second, Xi's trip in the United States expanded mutually beneficial practical cooperation in trade and other fields.

During the visit, Xi expounded on the nature of China-U.S. trade ties, saying that they serve as "ballast" and "propeller" of overall bilateral relations.

He used figures and examples to explain how the two economies are complementary to each other and how bilateral trade brings benefits to both sides, making clear the significance of maintaining the steady development of bilateral trade ties.

Xi said China and the United States should resolve their trade frictions through dialogue on equal footing and candid communication, instead of resorting to means of protectionism.

Xi noted the best solution to the trade imbalance between the two countries is to expand U.S. export to China, saying China hopes the U.S. side could soon take concrete steps to ease export restrictions on high-tech products and create a fair business environment for Chinese investors.

In face of the global economic crisis, China and the United States should jointly overcome the hardships and further strengthen macroeconomic policy coordination so as to quicken the development of a comprehensive mutually beneficial economic partnership.

Obama and Biden said they hoped the two nations could solve their trade problems with a practical and constructive attitude and achieve win-win results.

The two leaders said the United States will take China's trade concerns seriously and would like to seek proper solutions through dialogue.

In addition, the United States welcomes foreign businesses, including those from China, to invest in the United States and the United States is also willing to discuss with the Chinese side the possibility of Chinese enterprises investing in U.S. infrastructure projects, the two leaders said.

During Xi's visit, related departments of the Chinese, U.S. governments signed several cooperation documents on investment, agriculture, inspection and quarantine.

Firms from the two sides also signed trade and investment deals covering the areas of electronics, telecommunications, farm produce, energy, environmental protection, mechanics, chemical industry, pharmacy, among others.

Third, Xi's trip to the United States has deepened China-U.S. friendship and promoted local-level cooperation.

During the five-day visit, Xi made extensive contacts with Americans from all walks of life, engaging himself in the promotion of China-U.S. friendly ties and the consolidation and enlargement of the social and public basis of furthering China-U.S. ties.

In the small town of Muscatine in Iowa, which he visited 27 years ago as an official of China's Hebei province, Xi reunited with a dozen of his old friends for a teatime chat.

At a luncheon hosted by friendly groups in Washington, Xi told a moving story about how he facilitated a trip of an American lady who was trying to fulfil her late husband's wish of revisiting Kuling, his childhood home in Fujian Province in southeast China.

These two episodes have become impressive moments in China-U.S. friendship.

Xi encouraged people of both countries to make new friends and keep old ones to deepen friendship.

At the International Studies Learning Center in Los Angeles, Xi talked to American students face to face.

"Young people are the future of a nation," he said.