[Probing and analyzing Zhang Jingyue's "concept of tonifying kidney's yin and yang"].

Zhang Jingyue, a doctor of the Ming dynasty, is good at warming and tonifying, paying attention to tonifying the kidney. Based on the requirement of theory and practice, he held that: the method of tonifying kidney may be based on kidney -- yin; the using of bringing up yin, may be measured by containing yang, while the wonderful matter of supporting yang, may be producing yang with fostering yin. These form a unique scientific thought of "concept of tonifying kidney's yin and yang".