January 26, 1291 (GY twelfth lunar month 25), the Kublai life GuoShouJing dug Tonghuihe. reuse of eminent scientists GuoShouJing

Kublai let him in charge of the country's water conservancy work, dredging canals, canals, north-south traffic and supplies to facilitate exchanges. (Yuan Yuan twenty seven years December 20, 25), January 26, 1291 AD Kublai GuoShouJing recommendations, cited mostly northwest of spring, on the basis of the original Yunliang River heavier repair chisel, east Tongzhou into the White River, a total length of 164, dam lake 11 meter 20. The name "Tonghuihe. This way, you can make the Jiangnan supplies reaching as far as most of the Hangzhou Water Transport.