If the gross national product has increased and the public's consumption psychology has changed, then the supply of vegetables will increase significantly; if the gross domestic product has not improved or the supply of vegetables will increase significantly, the minimum living of urban residents will not be guaranteed; If it increases significantly, then either farmers' incomes or social welfare will increase, and in fact, the minimum living of urban residents is guaranteed. From this. ['Farmers have increased their income.', 'Social benefits have increased.', 'The consumer psychology has not changed.', 'Consumer psychology has changed.']