Kneel down and ask the superior to give advice on the lack of food in ancient China and its reasons

I think one of the most important reasons is the weather. The ancient agricultural economy was very dependent on the weather, and the drought and flood disasters were difficult to deal with at that time. The policies of an era are also very important. If it is during the Qingming period, the agricultural tax is determined according to the annual income of one year, which reduces the burden on farmers and accumulates farmers' inventory. However, if there is tyranny and countless taxes and chores, it will be difficult for the people to survive, let alone have food for every meal. In addition, if a lot of land is cultivated for a long time, the fertility will also decrease, and the harvest will naturally decrease. These reasons will lead to food shortage. Generally, when there is a food shortage, the court will open a warehouse for relief and send officials down to appease it. If left unchecked, peasant uprisings will be inevitable. In the late Ming Dynasty, Li Zicheng, Zhang and other peasant uprisings were all caused by large-scale natural disasters, and the people went to the road of resistance because of lack of food.