Introduction to the semi-basement square house: When this house was discovered, it was still in the same state as when it was burned down. Among the piles on the top layer, there are about 20 carbonized roof rafters, some of which are inverted toward the center, indicating that the roof may be in the shape of a "four corners with a spire". To the west of the living area of ​​the house is a platform that is 0.1 meters higher than the east. It may be the earliest "Kang", also called an "earth bed".