Chinese Compound for Changing Seasons. Yin Chiao has been a staple of traditional Chinese herbalists and acupuncturists and a household name in China for hundreds of years. It was developed during the Qing Dynasty (1644-1911) and is one of the most valued of all classic Chinese herbal formulas. It is used for imbalances associated with seasonal changes. Planetary Formulas Yin Chiao Classic is manufactured domestically with hand-selected herbs to insure the purity of this time-honored classic.