The year of 1958 was the most difficult year for the people of New China to be founded, that is, to move people with poor living conditions to better cities. Those people were among those who moved to the city in 1958. 1959 ——1961China experienced a period of "three years of economic difficulties". At the same time, it analyzes the different effects brought by various decision-making mistakes, focusing on grain as the lifeline and comparative index of causal chain that determines the rise and fall of national economy, and analyzes the proportion of rural production reduction due to disasters, production reduction due to decision-making mistakes and grain stock reduction due to high purchase at that time by econometric methods.

Three-year difficult period:

The "three-year difficult period", also known as the "three-year natural disaster", refers to the serious "Left" errors in the Great Leap Forward and the people's commune movement in China from 1959 to1year, plus from 1959 to/kloc-.