Nourish the Heart and Calm the Spirit (yang xin)

As the spirit resides in the Heart in TCM, excess or deficient conditions of the Heart will unsettle it, resulting in palpitations, anxiety and insomnia. Suan zao ren (Ziziphus spinosa) and he huan pi (Albizzia julibrissin) are examples that calm the spirit by nourishing blood and yin and alleviating qi stagnation, respectively.