"Nourishing Yang in spring and summer, nourishing Yin in autumn and winter" embodies the idea of "harmony of nature and man". Different physicians have discussed and analyzed the theoretical connotation of "nourishing Yang in spring and summer, nourishing Yin in autumn and winter" from different angles.Starting with the word "nourishment", this paper discusses the theoretical connotation of "nourishing" can be complementary or restrained;tonifying yang in spring and summer is appropriate for Yang deficiency, and restraining yang in spring and summer is appropriate for Yang hyperactivity;tonify...