Flat-roofed houses, Han folk houses. Popular in Puyang, Henan Province, mud flat-topped houses in many places in Northeast China also belong to this category. Its basic structure is beams, purlins and rafters. The roof has no ridge; it is made of bricks. Flat-topped houses can be terraced fields, and there is little rain in the north. There is no need to tip the roof to let the rain flow down like Jiangnan. First of all, it's not as rainy in the north as in the south, but it's windy. It will be affected if it is high. And you can receive as much sunshine as possible, and you can dry wheat in summer. There are things that can be placed in the north, which can only reduce the space occupation. Beautiful appearance and simple structure.