For trade use, the Tang Dynasty expanded through the North, East, and South throughout Siberia, Korea, and what now is Vietnam.The t'ang Dynasty (618-907)
Empress Wu was the first woman in that time to bear the title, "Emperor".
A dynasty is a sequence of rulers from the same family, stock, or group.
The T'ang Dynasty was associated with the Sui, and were often discussed as the same dynasty.
The T'ang Dynasty expanded on the administrative system that dated from the 4th and 3rd centuries B.C. and earlier.
They first compiled the T'ang code in 624 A.D.
The T'ang code had more than 500 articles dividing into 12 sections.