The Early and Medium-Term of Qing Dynasty Heilongjiang Towns and Climate Change

In the early and medium-term of Qing dynasty,Heilongjiang was under the important period for the development of towns.The period of the emperor Shun Zhi and Kang Xi was under the relatively colder period,towns were military-political towns;after the period of the emperor Shun Zhi and Kang Xi,climate gradually warmed,the towns entered a relatively warm period,military and political functions developed gradually and the economy function had played the more important role.In the early and medium-term of Qing dynasty,climate change was one of the main causes of the rise,development and migration.