" On February 28, 1972, the Sino-U.S. Shanghai Communiqué was issued. It said, 'The United States believes that the effort to reduce tensions is served by improving communication between countries that have different ideologies so as to lessen the risks of confrontation through accident, miscalculation or misunderstanding ... Countries should treat each other with mutual respect and be willing to compete peacefully, letting performance be the ultimate judge. No country should claim infallibility and each country should be prepared to re-examine its own attitudes for the common good. "

― , The World Turned Upside Down: A History of the Chinese Cultural Revolution