In mathematics, odd numbers are yang and even numbers are yin. When choosing a name, the odd and even numbers in the number of strokes should be matched appropriately. In the theory of Yi Xue, pure yin does not arise and solitary yang does not grow. Just like us humans, if we are all men but not women, or if we are all women but not men, there will be no mating of yin and yang to produce offspring. Similarly, when choosing a name, pure yin and pure yang are not good for development and destiny. In traditional Chinese medicine theory, an imbalance of yin and yang results in illness. Chinese medicine treats diseases with the aim of regulating yin and yang and balancing yin and yang. Therefore, the theory of yin and yang balance is equally important in naming. Generally speaking, a three-character name is taken as an example. Yin and Yang are the most auspicious;