Since the beginning of the new century, the status of the United States as the only superpower in the world is declining, and its ability to control international affairs is greatly reduced. If Obama carries out the "Obama New Deal" that conforms to the trend of the times, he has every chance to realize his "American dream" to a certain extent and restore the leading position of the United States in many international affairs. But we must never forget: First, Obama is not an isolated individual. He is the president of the United States who advocates "world peace under the rule of the United States" and has his own "difficulties" because of various domestic forces. Second, driven by the wave of economic globalization and the invisible hand of high technology, new changes will continue to take place in the international power balance, and world multipolarization will be an irresistible trend. As George Kennan, an old American diplomat, said before his death, the world will never accept any single leadership center, and "soft power", "hard power" and "smart power" are of no help. Therefore, Obama also has his limitations.

At present, the complementarity between China and America is only temporary. China's economic dependence on foreign countries has reached an astonishing 70%, while the proportion of foreign trade in almost all major countries has not reached this level. This means that once China enters the era of domestic demand, which currently accounts for about 70% of the economy in developed countries, subversive changes will occur. At present, the complementary model of "Made in China and Consumed in the United States" will be unsustainable.

Thirty years later, what China and the United States are really facing now is not "sharing the same enemy", but "sharing the same enemy", and they should have a "brand-new world view". The concept of "cooperation to meet * * *" confirms this view. -Li Cheng, a researcher at the Brookings Institution in the United States.

Compared with similar statements or communiques between China and the United States in the past, the biggest feature is that there are more expressions of "both sides believe", which shows that China and the United States have acquired * * * knowledge in more and more fields, and this * * * knowledge greatly transcends bilateral relations and is global. It reflects the new trend of the development of Sino-US relations. Both sides look at each other from a "head-up" perspective, and the relationship is more equal. China people are more and more confident and rational about the United States; Americans have also begun to put down their posture and look at China from a "head-up" perspective. -Meng Xiangqing, China, a professor at China National Defense University, and the United States have not yet entered the "yes era".

Sino-US relations are multifaceted. There must be a lot of cooperation, but there must also be differences and competition. This is not an "era" between China and the United States. Although both sides are "polite", problems, complaints and pressures still exist.