After Being Exiled to Shu, I Sealed the Title of Marquis by Controlling Floods.

The Shu road collapsed, the plank road broke, and flash floods swallowed people every year. The imperial court sent seven groups of flood control envoys, three died and four escaped. Later, an exiled prisoner came. The charge was "deceiving the public with evil words" - it is said that he said something impossible to the court. No one cares about him. But when he stood on the bank of the Minjiang River, what he saw was not a dead end—it was an underground ditch three feet underground, water veins that had been abandoned for thousands of years, and thousands of hectares of fertile farmland waiting to be awakened. Others control floods by praying for rain. He relies on contour lines to control water. The weirs and blockages were cleared, the road to Shu was opened, and Min water was diverted to irrigate thousands of miles of barren fields. From Dai Zui to exile, it became the "Living Water Sutra" in the mouth of the people in Sichuan.