1, yam is flat but not dry, sweet and astringent, and belongs to both flat and astringent varieties. It has a wide range of functions, such as invigorating spleen, lung and kidney. Yam is flat and not dry, sweet and astringent, and belongs to both flat and astringent varieties.

2, it has a wide range of functions, tonifying spleen, lung and kidney. The function of yam is very distinctive, which can nourish yin and replenish substances, benefit qi and increase function, benefit qi and nourish yin, promote fluid production to quench thirst, tonify lung, spleen and kidney, and has dual functions of consolidating essence and reducing urine.