While within the QTP, the earliest culture is the Yangshao culture, of whom the number of sites increases rapidly. Fromthe Loess Plateau, the culture expanded towards the upstream of the Yellow River, including its tributaries (e.g. Huangshui River) in the QTP. In the early stage of the Yangshao culture in the Loess Plateau, the pottery technology had been significantly improved. However, no site of this period was found in the QTP.