The yin within yin: Things characteristic of yin are in yin position.
The yang within yin: Things characteristic of yang are in yin pasition
The yin within yang: In the theory of yin and yang, this is the yin side
when something characteristic of yang is further divided into yin and yang.
The yang within yin:  In the theory of yin and yang,  this is the yang side when something characteristic of yin is further divided into yin and yang.

1. In terms of flavor, things with a rich flavor are purely yin and those with a thin flavor are yang within yin. Those with a rich smell are purely yang, and those with a light smell are yin within yang.
2. Excessive"flavor can cause diarrhea. Excessive yang heat can drain vital qi.
3. Thin flavour can dredge collateral channels. Normal yang qi will give power to vital qi.
4. Things sudorific and hot and sweet in flavor are yang by nature. Things that can discharge and taste sour and bitter are yin by nature.
Excessively powerful yang qi will harm vital qi which depends on normal yang qi. Excessively powerful yang qi will harm vital qi, and normal yang qi will enhance vital qi. More information, please click to learn Chinese herbal formula--Pudendum-Itches pills.