Zhang et al. (2019) did a study of 109 Sino-Tibetan languages to suggest a Sino-Tibetan homeland in northern China near the Huanghe basin. He found there was a split between Sinitic languages and the Tibeto-Burman languages approximately 4,200-7,800 years ago (with an average of 5,900 years ago). This is connected with the expansion of the Yangshao culture and Majiayao culture. Others agree by using different data; they say it came from around 7,200 years ago, around the Cishan and early Yangshao culture.