The territory of the Tang Dynasty extends to the Aral Sea in the west, Siberia in the north, Sakhalin Island (sakhalin island) in the east and 18 in the south, which is unprecedented in the history of China. However, this does not mean that the territory of the Tang Dynasty is so large, because it has never reached such a range at the same time, and the time to reach the farthest point is very short. With the constant change of "weak-strong-weak" situation, the territory of the Tang Dynasty also showed the change of "small-big-small".
According to statistics, the area of Tang Gaozong in Tang Dynasty reached 125 1 1900 square kilometers, and Xuanzong in Tang Dynasty also reached 8,895,900 square kilometers. (Some people say that it reached 6.5438+0.5 million square kilometers at the highest time, but this statement is controversial. ) Followed by the Northern Song Dynasty, the area was only 2,835,600 square kilometers, shrinking several times.