Founded in 1988 by Academician Bai Chunli, Benyuan Nano-instrument is the first high-tech enterprise specializing in R&D, production, sales and service of scanning probe microscope in China. CSPM5500 multifunction scanning probe microscope is a product transformed from the achievements of "National Major Scientific Instrument and Equipment Development Project". It integrates more than 10 functions of atomic force microscope, scanning tunneling microscope, magnetic force microscope and electrostatic force microscope. It is a mainstream research-level multi-function professional instrument in China at present.