The balance of yin and yang means that the growth and decline of yin and yang are coordinated, neither excessive nor extreme, showing a coordinated state. The balance of yin and yang is the foundation of vitality. Balance of yin and yang makes people healthy and sacred; People with imbalance between yin and yang will get sick, premature aging and even die. Therefore, the purpose of health preservation is to maintain the balance of yin and yang in life. The relationship between Yin and Yang is ebb and flow, mutual root and mutual control, and unity of opposites. The anode is negative and the cathode is positive; The anode is black and the cathode is long. Yang governs heat and yin governs cold; Yang should take the initiative and Yin should be quiet. Yin Pingyang is the secret, and the spirit is the rule; Yin and yang are separated, and the essence is absolute.

Yang: Everything that is sunny, extroverted, bright, uplifting, warm and moving will always belong to Yang.

Yin: Everything that is yang, defensive, yin, descending, cold and relatively static belongs to Yin.