The Tang dynasty, which began in 618 and ended in 907, is generally regarded as the most prosperous period in Chinese history. After three hundred years of development, the Tang Dynasty has become the most prosperous power around the world. Its capital Chang’an was the largest city in the world at that time. During this period, economy developed, commerce thrived, social order was stable, and even the border was open to the outside. Wealth increased due to urbanization ,art and literature also flourished Li Bai and Du Fu are poets who are renowned for their simple and natural writing style. Their poems touched the hearts of scholars and ordinary people ; even today, many of their poems are still widely read and recited by children and adults.