What was the general structure of rural houses 20 years ago?

1 and 20 years ago, that is, 1989 years ago, the structural form of rural houses in developed areas has changed from old adobe houses to brick-concrete structures. However, in poor mountainous areas, there are still adobe houses, stone masonry houses and wooden houses left by the older generation.

2. "Frame structure" refers to a structural form of buildings. This system is a structural system formed by using vertical and horizontal frames composed of beams and columns, which bears both vertical and horizontal loads. Usually used in low-rise or small high-rise buildings.