Professor LI Ping was experienced in treatment of diabeitc nephropathy.She emphasized the entirety which indicated the interaction of environment and human,and the interaction of five organs before prescription of Chinese Medicine formula.She also applied recent findings of the modern medicine in the treatment of diabetic nephropathy.In syndrome differentiation,she put stress on the combination of disease differentiation.In clinical research,she found the syndorme distribution of daibetic nephropathy changes with progression of Morgensen staging.