236 A Short History of The World reached much farther, extending at last, through tributary Turkish tribes, to Persia and the Caspian Sea. The new China that had arisen was a very different land from the old China of the Hans. A new and more vigorous literary school appeared, there was a great poetic revival ; Buddhism had revolu- tionized philosophical and religious thought. There were great advances in artistic work, in technical skill and in all the amenities of life. Tea was first used, paper manufactured and wood-block printing began. Millions of people indeed were leading orderly, graceful and kindly lives in China during these centuries when the attenuated populations of Europe and Western Asia were living either in hovels, small walled cities or grim robber fortresses. While the mind of the west was black with theological obsessions, the mind of China was open and tolerant and enquiring. One of the earliest monarchs of the Tang dynasty was Tai-tsung, who began to reign in 627, the year of the victory of HeracUus at Nineveh. He received an embassy from Heraclius, who was probably seeking an ally in the rear of Persia. From Persia itself came a party of Christian missionaries (635). They were allowed to explain their creed to Tai-tsung and he examined a Chinese translation of their Scriptures. He pronounced this strange religion acceptable, and gave permission for the foundation of a church and monastery. To this monarch also (in 628) came messengers from Muhammad. They came to Canton on a trading ship. They had sailed the whole way from Arabia along the Indian coasts. Unlike HeracHus and Kavadh, Tai-tsung gave these envoys a courteous hearing. He ex- pressed his interest in their theological ideas and assisted them to build a mosque in Canton, a mosque which survives, it is said, to this day, the oldest mosque in the world.
