Using Bean Bags to Develop Technology in the Southern Song Dynasty

During the Lizong period of the Southern Song Dynasty, Lin'an City was on the eve of the defense of Xiangyang in the early days of the Song-Mongolian War. At this time, the Southern Song Dynasty was under military pressure, but its technology was at the peak of the world. Movable type printing was mature, compasses were used for navigation, muskets had taken shape, and facilities such as water spinning wheels and water drainage were widely used in industry. The protagonist Chen Yanqiu upgraded Doubao's existing technology in the Southern Song Dynasty, opening up a new dimension of energy utilization and leaving a strong mark in history.