1. From Yuan Zhen’s solar terms poem of the Tang Dynasty, the poem "Spring Equinox in the middle of February", which is about the twenty-four solar terms, means that the spring equinox is the time when day and night are equally divided, and the cold and heat are balanced.
2. Instead of competing for superiority between yin and yang, it is better to walk deeper into the spring rain and vividly depict the climate characteristics of the vernal equinox.
During the vernal equinox, the two qi of yin and yang reach a balance, and spring rain is also one of the characteristics of this solar term. Therefore, this sentence describes the climate characteristics and the balance of yin and yang during the vernal equinox.