The abduction of Qinzong weakened this government in the Jingkang incident.  
This time period began a system of community-based law enforcement known as the baojia. The abduction of Qinzong weakened this government in the Jingkang incident.  During this dynasty, The Four Books were emphasized by the rival of Lu Jianyuan, the thinker Zhu Xi. This empire was deposed as Zhang Shijie lost to Zhang Hongfan at the Battle of Yamen. This time period saw massive expansion of the civil service exams by Wang Anshi. Movable type, the compass, and gunpowder were revolutionized in this time period that began with Emperor Taizu. For 10 points, name this Chinese dynasty split into Northern and Southern parts that came after the Tang and fell to the Mongols.
This time period began a system of community-based law enforcement known as the baojia.
Song Dynasty