deficient pattern of depression syndrome were given less attention than excess patterns in traditional medical literature. As an experienced hepatology doctor of Chinese medicine, Professor Wang Yanhui has innovative understanding on deficient pattern of depression syndrome: liver-kidney yin deficiency is basic causal factor for depression syndrome. In clinical practice, there are 3 categories: deficiency of (yin) fluid, (yin) blood or (yin) essence, which are to be treated respectively with cooling-moistening method, warming method, and supplementing method.