In the first year of Jingdezhen, Song Zhenzong (A.D. 1004), Qidan Xiao Taihou and Liao Emperor Yelulongxu led 300,000 troops to attack the Song Dynasty, and Song Zhenzong personally expedition. The two sides will meet in Zhoucheng, Liao country. Because of the loss of generals, they don't want to fight again, so they take the initiative to make peace. Cao Liyong was sent to the Song Dynasty, and finally an agreement was reached. Because Gezhou was called Ge Yuan in ancient times, it was called "the Union of Ge Yuan" in history.

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First, the Liao and Song Dynasties were brotherly countries, and the Emperor Sheng Zong of Liao was young, calling Song Zhenzong his brother, and later generations still looked down upon the world with contempt. 2. Taking Baigou River as the national border, the two sides withdrew their troops. (Liao returned to Song Suicheng and Ying and Mo Zhou. After that, all thieves and fugitives crossing the border must not stop hiding from each other. The city at the junction of the two dynasties is as usual, and there is no city god to build. Third, provide100000 silver and 200000 silk to Liao every year. Delivery to Xiongzhou. Four, the two sides set up a monopoly market at the border to carry out mutual trade. After the conclusion of the Covenant, there was no large-scale war between Song and Liao for more than 100 years. Because Gezhou is also known as Ge Yuan, it is called "Ge Yuan League" in history.

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Under the alliance of 1, Song and Xia negotiated peace, but they had to talk about "harmony" under the situation that ethnic minorities constantly attacked the regime and threatened the security of the Northern Song Dynasty. 2. The rulers of the Northern Song Dynasty accepted humiliating conditions in order to maintain their dominant position, which was based on inequality. 3. Giving a large amount of annual money to ethnic minority regimes every year increases the financial burden of the country, resulting in poverty and financial difficulties. 4. In order to pass on the crisis, the rulers have aggravated the exploitation of the people, resulting in the intensification of class contradictions. The uprising continues. The single-source alliance ended the state of war, maintained the economic exchanges between the two countries, and was conducive to the economic and cultural exchanges between the two sides and the cultural development of the Chinese nation.