This book systematically studies income distribution order by exploring corruption, political power, labor-capital relation, and recessive economic problems. By categorizing various incomes, the connotation of "income distribution order" is clearly defined, and the income distribution pattern and the formation mechanism of income distribution are studied. Based on a new perspective, this book features the in-depth analysis of reasons for the chaotic income distribution order and naturally derives solutions to standardize the income distribution order. The research method used in this book pays special attention to field research and multidisciplinary comprehensive research method. This study obtains first-hand data through three large-scale household income questionnaire surveys nationwide, through which the income gap between urban and rural areas, different regions, industries, and different income groups in China is measured. Based on this data, the study also analyzes the influence of different factor endowments on residents' income and studies the contribution of these factor endowments to income gap, which contributes on the policy recommendations to narrow the income gap.