Grand Canal Grain Transport System

Timeline

1. 960–1127Bianjing–Jiangnan grain canal · HenanAfter the Northern Song established its capital at Bianjing, grain transport became the lifeline of the capital's food supply; the court created the office of grain transport supervisor, dredged the Bian River, Huimin River, and other waterways, regulated grain boat grouping, tonnage, and deadlines, and shipped Jiangnan rice north via the canal and Yellow River system, supporting a capital of a million people and northern garrisons.
2. 1127–1200Lin'an and the Jiangnan canal network · ZhejiangAfter the Southern Song settled in Jiangnan, Lin'an became the grain transport dispatch center; besides inland canal boats, sea transport carried grain north along the southeast coast to north of the Huai River, then transferred to land or inland waterways, forming a combined river-sea transport system; Jiangnan hydraulic and shipbuilding technology supported continued growth in grain boat capacity.
3. 1211–1220Huai River–Yangtze grain transport corridor · Huai River basinDuring the Mongol attack on the Jin, fighting along the Song–Jin border was frequent; the Southern Song strengthened military grain transfer along the Huai River line, and the grain transport system, besides supplying Lin'an, also handled frontline material dispatch; canal and sea routes were forced to adjust under wartime pressure, and transport organization and warehousing systems were tested in actual combat.
4. 1150–1234Zhongdu section of the Grand Canal · North ChinaAfter establishing its capital at Zhongdu, the Jin continued to use and maintain the northern section of the Grand Canal, setting up the Waterworks Directorate to manage dredging and grain boat dispatch, collecting tax grain from the North China Plain and Liaodong and shipping it via the canal; Mongol invasions late in the Jin repeatedly disrupted transport routes, until the northern grain transport system was reorganized after the fall of the Jin in 1234.