The Tang Dynasty (618–907 CE) was the moment China became a crossroads of Eurasian civilization — absorbing Buddhist philosophy from India, silk technology spreading westward, Persian refugees at court, and Central Asian music in the capital. Its analytical question is what happens when a civilization stops being a destination and becomes a junction.
China under the Tang was not merely powerful — it was permeable. The capital Chang’an held a million people and neighborhoods of Persians, Arabs, Sogdians, Koreans, and Japanese. That openness was not accidental. It was the organizing principle of an empire.