Whoever put forward the slogan of "free food for all fields" won the support of the people.
In the summer of the 13th year of Chongzhen (1640), Li Zicheng led the troops from Fangxian County, Hubei Province, and entered Henan. In view of the social reality of high concentration of land, heavy taxes and poor people in the late Ming Dynasty, the rebel army clearly put forward the slogan of "all fields have no food", which was deeply supported by farmers and sang the ballad of "open the door to welcome the king, and the king will not receive food".