High Middle Ages · East Asia · Technology
1002
Song court sponsors massive canal maintenance
1002
Emperor Zhenzong ordered a comprehensive dredging and repair of the Grand Canal system, deploying tens of thousands of laborers to keep the vital artery between the Yangtze rice lands and the northern capital at Kaifeng flowing. The canal carried over six million shi of grain annually, a logistical achievement that sustained the world's largest city and its million residents.