The empire of the union that lived its golden age with its establishment in 618. Tang was interested in running Western China and contributed to revitalizing Silkroad. It entered the rule of Western China in the 7th century and conquered the Kingdom of the Oasis. So he founded Bukjeong Dohobu and Anseo Dohobu and started to clash with Islamic forces. At that time, Tang was the starting and ending point of the Silkroad trade. Big rich men who have saved a lot of money with Silkroad trading.