The gap between China and the United States: actually not at the top level. Only looking at the results without considering the process, China has been in existence for over seventy years and has already pulled the world back into a "two-tier structure," which in itself explains the issue; China's rise is almost a unique miracle on this planet that cannot be replicated by any other country. This can only mean one thing: China's top level is world-class. The gap between China and the United States is even less at the grassroots level.