The relationship between the Northern Song Dynasty and the Southern Song Dynasty?

The Northern Song Dynasty is a dynasty following the Five Dynasties and Ten Kingdoms in the history of China. Nine emperors enjoyed 167 years, from 960- 1 127 years. The Southern Song Dynasty was a dynasty with developed economy, prosperous culture and scientific and technological progress in China's history. After the Nine Emperors, 152 years from 1 127- 1279. Northern Song Dynasty and Southern Song Dynasty are collectively called Song Dynasty, also known as Song Dynasty, because the royal family surnamed Zhao, also known as Song Dynasty.

The northeast of the Northern Song Dynasty is bounded by Haihe River in Bazhou, Hebei Province and Yanmenguan in Shanxi Province. The northwest is bounded by Hengshan Mountain in Shaanxi, East Gansu and Huangshui in Qinghai. The southwest is bounded by Minshan and Dadu River. In Song Shenzong, Hehuang was recovered by opening the Xihe River. During the Song Huizong period, Longyou was established in northern Qinghai, and the foreign relations of the seven states of Longyou were further developed on the basis of the Tang Dynasty. In East Asia, they have close communication with North Korea and Japan. In Southeast Asia, they also strengthened their ties with Vietnam and Indonesia, and at the same time, they also influenced West Asia and Africa. .

The Southern Song Dynasty is the dynasty with the most developed economy, science and technology, foreign trade and opening to the outside world in the history of China. The Southern Song Dynasty coexisted with the Jin Dynasty, the Western Liao Dynasty, Dali, Xixia, Tubo and the Mongolian Empire that rose at the beginning of the13rd century. The devastating impact of nomadic people on the advanced relations of production in the Song Dynasty made the advanced eastern civilization, which had been in the rising stage, gradually turn to decline and eventually fall behind the mainstream stage in the world.