This is the name for the Pleistocene loess layer that was proposed by Liu Dongshan and Zhang Zonghu in 1962. This loess layer is 95.5 m thick. The typical profile is located in Chenjiaya in Wangjiagou Village, Lishi County, Shanxi Province. Based on the lithology, this profile can be divided into two sections: (1) The lower section conformably overlies the Wucheng loess. It is composed of yellow-light yellow clay with a dense and uniform texture, no bedding and large pores, and it contains 14 palaeosol layers. (2) The upper section is composed of grey yellow-yellow loess with a loose soil structure, vertical joints and seven thick layers of palaeosols. Dating of S5 indicates that the palaeosols formed 500,000 years ago under extremely warm climatic conditions. The Lishi loess is generally 60–80 m thick, but it can be up to 250 m thick in Lanzhou, where it forms the base of the Loess Plateau.