Song, Liao, Jin, and Yuan Dynasties-Modern Period Introduction: During the Song, Liao, Jin, and Yuan Dynasties, the economy and society continued to develop, and the culture showed diversified characteristics. After the excavation of Huitong River in the Yuan Dynasty, Liaocheng's location advantage was greatly improved. During the Ming and Qing Dynasties, Liaocheng took advantage of the canal water transportation and became an important commercial and trade town along the canal, an important military base and the political and cultural center of Western Shandong. In modern times, the democratic revolution and anti-imperialist patriotic movement broke out in Liaocheng, and many outstanding figures emerged, making positive contributions to the liberation of the Chinese nation and the victory of the Chinese revolution.