Heilongjiang is a province with a large number of immigrants. Before liberation, millions of immigrants who "traveled to Guandong" flocked here to seek a livelihood. After liberation, immigrants continued to pour in in large numbers, and its scale is still second to none in the country. Thirty years after the reform and opening up, the population situation of Heilongjiang Province has undergone a major reversal, from a province that has been accepting immigrants for a century and a half to a province with a net population outmigration. The scale of its emigrated population is the epitome of Heilongjiang's economic malaise over the past 30 years. This book is divided into three parts, sorting out the history of ancient immigration, foreign immigration, and modern immigration in Heilongjiang. It is of great significance for formulating population development policies that are in line with the actual situation of Heilongjiang Province.