Topic on discussion of profundity and subtlety of pulse essentials in the plain questions (Seventeenth article part VIII) [1]

Therefore, during the forty-five days after the Winter Solstice, the yang qi increases gradually while the yin qi decreases by degrees. During the forty-five days after the Summer Solstice, the yin qi increases gradually while the yang qi decreases by degrees. The pulse variations are responsive to the changes of yin and yang of the four seasons. If they fail to be responsive, we will be able to foresee the death date according to the changes of pulse and seasons. The miracle exists in the pulse. It is an inspection that no account can be neglected.

Key Words: discussion of profundity and subtlety of pulse essentials, in the plain questions