Liu Yuxi, a poet in the Tang Dynasty, wrote Ji Ji Ji, saying that "workers should think and look around, and guide them according to the situation", and Du Fu, a poet sage, also wrote the poem "Irrigation a small garden with buckets". According to Taiping Guangji, in the early years of the Tang Dynasty, when monks watered the garden, they "connected it with wooden barrels and sucked it into the well." In March, the peach blossom waves in Du Fu, and the river flows back to the old mark. There is no sand tail in the morning, and the blue color moves Chai Men. Pick up the delicious bait and pour it into the small garden with a pipe. With countless birds, it's noisy to take a shower. Dufuyue Gorge has a winding pond with a cloud top and no well in the rock. Yun 'an sells water, slaves mourn, and fish move back to their hearts. The west of Baidicheng is full of bamboo, but there is no water diversion pipe. Life is stagnant, physical strength is difficult, and it is difficult to compete for water.