This article summarizes RUAN Shiyi’ s experience in treating chest Bi Syndrome. RUAN holds that chest Bi syndrome is a syndrome of deficient-fundamental with excessive incidental

with the spleen and kidney deficiency as the fundamental

while the Qi stagnation

blood stasis and phlegm gatihering as the incidental. Based on this

using the theory of "softening hard masses and resolving the nodules "

Prof. RUAN invents the chest Bi syndrome treatment principles of "benefiting-kidney and nourishing-spleen " and "softening and resolving hard masses". By long-term clinic practice and experimental researches

these principles prove to be effective for chest Bi syndrome.