What are the characteristics of traditional folk houses in the three northeastern provinces?

Traditional folk houses in the three northeastern provinces have the characteristics of large roof slope, thick walls and small windows. In fact, there is a reason, because the steep slope of traditional houses in the three northeastern provinces is related to more rainfall and snowfall, which can effectively prevent a large amount of rain and snow from accumulating on the roof; The thick walls and small windows of traditional houses are related to the low temperature. Thick walls and small windows are conducive to indoor thermal insulation.