Before the Islamic conquest of Afghanistan communities of various religious and ethnic background lived in the land. South of the Hindu Kush was ruled by the Zunbil and Kabul Shahi rulers. When the Chinese travellers (Faxian, Song Yun, Xuanzang, Wang-hiuon-tso, Huan-Tchao, and Wou-Kong) visited Afghanistan between 399 and 751 AD, they mentioned that Buddhism was practiced in different areas between the Amu Darya (Oxus River) in the north and the Indus River in the south. The land was ruled by the Kushans followed by the Hephthalites during these visits. It is reported that the Hephthalites were fervent followers of the god Surya.