It is said that once a person reaches a certain age, their Qi and blood begin to decline. The *Huangdi Neijing* (Inner Canon of the Yellow Emperor) states that after the age of 40, Yin energy is halved, leading to a failure of the blood to nourish the heart. At night, Yang needs to be neutralized by Yin; when Yang cannot enter Yin, it becomes impossible to fall asleep.

In Traditional Chinese Medicine, sleep is defined as "Yang entering Yin." Insufficient Qi and blood lead to insomnia, which typically manifests as difficulty falling asleep, being easily startled or awakened, irritability, very little sleep at night, lack of energy during the day, and night sweats. This condition requires nourishing Yin, supplementing blood, calming the spirit, and nurturing the heart. Today, I will introduce a Chinese medicine that can nourish the heart, clear fire, and calm the spirit: Tianwang Buxin Wan (Emperor's Tea for Heart Nourishment).

In this formula, Rehmannia glutinosa nourishes yin and supplements blood, serving as the sovereign herb. Asparagus cochinchinensis and Ophiopogon japonicus nourish yin and clear heat, while Ziziphus jujuba var. spinosa and Platycladus orientalis nourish the heart and calm the spirit; Angelica sinensis supplements blood and moistens dryness—these together serve as the minister herbs. Codonopsis pilosula supplements qi, and Schisandra chinensis supplements qi, constrains yin, and calms the heart and spirit. Poria cocos, Polygala tenuifolia, and Acorus calamus transform phlegm, clear heat, calm the heart and spirit, and facilitate communication between the heart and kidney. Scrophularia ningpoensis nourishes yin and descends fire to prevent deficient fire from flaming upward. Salvia miltiorrhiza invigorates blood and dispels stasis, Cinnabar settles the heart and calms the spirit, Platycodon grandiflorus carries the medicinal properties upward, and Glycyrrhiza uralensis harmonizes all the herbs—these serve as the assistant and messenger herbs. The entire formula achieves the effects of nourishing yin, supplementing blood, tonifying the heart, and calming the spirit.

A reminder to everyone: Traditional Chinese Medicine emphasizes personalized prescriptions tailored to the individual. Do not self-medicate. If you have any health concerns, please consult a professional physician for a proper syndrome differentiation and consultation.