A study on the Sinocentric world system reveals that the multiple periods of Pax Sinica, when taken together, amounted to a length of approximately two thousand years.
[10] The Silk Road emerged as a major route that connected the East and the West after the Han diplomat Zhang Qian established contact with the numerous Central Asian tribes and states, thus facilitating commerce and cultural exchanges.
[13] The Tang capital, Chang'an, was a major economic and cultural hub, and was the world's largest urban settlement at the time.
[13] The amount of interaction between China and Japan increased; Chinese influence on Japanese culture and politics became more prominent since the Tang dynasty.
[21] This period saw the formal institutionalization of the Chinese tributary system, illustrating the great political power of China at the time.
[29] The multicultural and multiethnic nature of the Qing dynasty was fundamental to the subsequent formation of the modern nationalist concept of Zhonghua minzu.