Zhao Guanhe transformed into a poor scholar in ancient times. He passed by his hometown's fields on his way to take exams when he slipped and fell into a dry ditch. He lay down at the bottom of the canal, but instead of falling unconscious, he took out his charcoal and began to draw a topographic map. The county has tried it, the government has tried it, and the policy topic for the conference test has been decided: on irrigation. All the scholars in the examination room were quoting classics. He wrote a "Terrace Irrigation Construction Plan and Budget Table". The examiner was waiting until midnight when he suddenly shouted: "Is this a policy paper or a report from the Ministry of Industry?" Zhao Guanhe passed the exam and was sent back to his hometown to be the county magistrate. He picked up a hoe from the backyard of the county government office and went to the countryside. Three years later, four magistrates from neighboring provinces jointly submitted a letter requesting the imperial court to transfer Magistrate Zhao to their county. The letter read: "I have raised my own transfer expenses, and I only ask Mr. Zhao to teach us how to farm."
