What are the unknown reasons for the "Huguang filling Sichuan" immigrants in Qing Dynasty?

According to historical records, it was because of Sichuan that Huguang filled Sichuan that it migrated on a large scale. According to statistics, at that time, residents from more than ten provinces such as Jiangxi, Guangxi and Hubei participated in this migration, but it was called Huguang to fill Sichuan because the most people came to Sichuan.

Sichuan was once called the land of abundance, but after nearly forty years of war, killing, plague and to my surprise, there were tigers. The tiger went down the mountain and ran amok in the street. It's terrible to think about it now. At that time, Sichuan was prosperous, the people lived and worked in peace and contentment, and the population was as high as 6 million, which was the place where officials showed their fists and feet. But decades later, it became devastated and desolate, and its population dropped sharply to less than 500,000. "People within a thousand miles of Fiona Fang, Sichuan, are not as good as people in a county."

At that time, Dedi Zhang, the governor of Sichuan, submitted a heavy paper to the emperor in the seventh year of Kangxi. Governor Zhang said in the throne that he was very excited to be arranged by the emperor to be an official in the land of abundance, and he had planned to do something in this place. I didn't expect to see the land of abundance, which was once riddled with holes. Not only is there no way to increase taxes here, but it is also difficult to collect taxes. Governor Zhang was exhausted, and trouble sleeping finally thought of a solution: immigration.

So Huguang fills Sichuan. The reason why Sichuan has changed from a land of abundance to a land-lost disaster is both natural disasters and man-made disasters. Plague and tiger disaster are beyond our control. When they come, we have to accept our fate instead of praying for God's blessing. Only our own people can find ways to protect ourselves. But war can be artificially controlled. The Sichuan disaster also proved that the war was extremely destructive. It also makes us understand that only peace can make people live and work in peace.