"Mutual harm" refers to the mutual harm in the eight characters of Mao and Chen, that is, mutual resistance. Specifically, Mao and Chen Dou represent spring. Mao is from 3: 00 am to 5: 00 am and Chen is from 7: 00 am to 9: 00 am. Their mutual harm shows that the weather in spring is unstable and prone to climate anomalies and diseases.
"Three branches of Yin, Mao and Chen" refers to the three branches of Yin, Mao and Chen in the eight characters. Specifically, Yin represents winter, Mao represents spring, Chen represents summer, and the meeting of the three branches represents the cycle of the four seasons and the continuation of life.
As can be seen from the above explanation, "Chen Mao harms each other" and "Yin Mao Chen Sanhui" are two opposite meanings. If a person's eight characters have both "mutual harm between Mao and Chen" and "three meetings of Yin, Mao and Chen", then this person may have both the influence of unstable weather in spring and the vitality of continuous circulation of the four seasons. The specific aspects of the influence need to be analyzed in combination with the specific eight-character and life chart.