In December 2011, the Lijiang Ancient City Protection Administration carried out the demolition of the big waterwheel and replaced it. During this period, many Lijiang merchants, Lijiang tourists and netizens were shocked whether to dismantle the big waterwheel. The big waterwheel lasted 14 years. The wind and sun were badly damaged. This time, Just a thorough repair, for it to change "new". The water truck, also known as Kong Mingche, is the oldest agricultural irrigation tool in China. It is the superb labor skills created by the first people in the process of conquering the world, and is a precious historical and cultural heritage.