Bathroom.
A medicinal bath generally refers to adding certain Chinese herbs to the water before bathing, promoting health as the medicine is absorbed through the skin, moving through the meridians to reach the organs, thereby regulating organ function, balancing Yin and Yang, promoting blood circulation through the meridians, and nourishing the entire body.
So, after learning about the benefits of medicinal baths, Xu Chang'an had let Yun Qian use them many years ago.
But he eventually gave up.
Because medicinal baths not only failed to improve Yun Qian's physique but also disrupted her body's balance, causing various adverse reactions like headaches and palpitations.
In the end, Xu Chang'an, with his lack of medical expertise, transformed Yun Qian's medicinal bath into... simply sprinkling petals of peonies and begonias.
Petals are rich in lipids, not only making them smell pleasant but also relaxing stiff bodies.
...