Literature Reference: 右丞相，但能济人治国调阴阳，官牛领穿亦无妨。—— 《新乐府 官牛 讽执政也》 白居易 If the Right Minister can govern the country and harmonize yin and yang, even if the official ox's collar is worn out, it does not matter. From 'New Yuefu: The Official Ox' by Bai Juyi.
调:
Arrange and handle matters, investigate and comprehend the situation.
阴: Darkness and brightness, yin and yang. The interplay of yin and yang is the essence of the Dao.
Meaning: To harmonize yin and yang, achieving a state of balance and harmony.