introduction of my tutor's research The National Multi-Purpose Regional Geochemical Survey (NMPRGS) Project, which was successively affiliated with Geological Survey and the national soil survey and pollution prevention, was initiated by China Geological Survey of the Ministry of Land and Resources in 1999. The coverage of this project included areas of quaternary system, in Plains basins, lakes, beaches, forests, grasslands, wetlands, coastal waters and hilly loess plateau. There has been 2 million km2 of the land area of China finished until 2015, covering most of the eastern and central China and parts of the west. According to DZ/T 0258-2014 Specification of Multi-Purpose Regional Geochemical Survey( 1: 250000), soil geochemical survey was applied in this project and analysis of 54 elements/parameters for soil and sediment samples was carried out by large precision instruments, in order to obtain a large number of analytical data with high quality. It is a basic work to carry out statistics and data analysis for soil and sediment samples according to National Multi-Purpose Regional Geochemical Survey. Data derived from this project were approximately 2.55 million, covering 1.5 million km2 of aforementioned land area and providing soil science, ecology, biology, environment, geography, agriculture and other fields and research and application for Ministry of Land and Resources, Agriculture, Environmental Protection with valuable basic data and information.