In fact, there is an Erwang Temple in Dujiangyan, where Li Bing and his son have been worshipped by local people for more than 2,000 years. It can be said that Dujiangyan has been used for more than 2000 years and is still playing the role of irrigation and dredging. This is the credit of Li Bing's father and son, and it is also the credit of Li Bing's creation of Dujiangyan. It can be seen that this Erwang Temple is also an important evidence of the existence of Li Bing and his son. So besides, what can directly prove the existence of Li Bing? Li Bing is an ambiguous person in history. No wonder many people question the existence of this man. After all, the earliest record about Li Bing didn't even have a surname. His personal introduction is also very brief. Even when he was born, there was some controversy.

However, Dujiangyan's achievements are real. Even without Li Bing, this is the result of the collective efforts of Sichuanese. It is because of their courage and wisdom that they left a precious Dujiangyan for future generations. Li Bing was a native of Qin during the Warring States Period. He is proficient in astronomy and geography. One year, it rained for more than ten days in the village. The villagers are very worried. If the rain continues, the crops will rot. A few days later, Bing looked at the sky and told everyone that they could go out now. Nobody believes it. The weather will clear up soon. People are surprised that Li Bing can see clouds and know the weather.

It is said that Li Bing inserted many bamboo poles in his yard to observe the movement of the sun, and also opened the skylight on the roof to observe how the moon moved. Over a long period of time, I have accumulated rich knowledge of astronomy and meteorology and can predict the weather.

Li Bing, who is less than 20 years old, has studied in thousands of books and is about to start a journey of thousands of miles. He traveled all over the mountains and rivers of Qin. He went to Shuijing and Weishui to study how they flowed into the Yellow River, how they irrigated the Guanzhong Plain, and how they figured out the difference. He also visited the flood control project built by Dayu in Luoyang, and went abroad to visit Du Ying of Chu (now Jiangling City, Hubei Province). One day, he saw a local swimming competition and immediately signed up to let southerners know about the water quality of northerners. "Hua Yang Zhi Shu Zhi" also records that Li Bing once installed a stone man water level gauge in Dujiangyan, which was an early water level observation facility in China.