How to explain Ding Mao, Wu Bing, Ren Chen and Ren Yin?

Ding Mao: It is one of the main branches, and the order is the fourth. The former is Bing Yin, and the latter is Chen Wu. On the five elements of yin and yang, the heavenly stem belongs to the fire of yin, and the foundation of the earthly branch belongs to the wood of yin, which is the fire of wood. Bingwu: It is one of the main branches, with rank 43. The former is B-Si and the latter is Ding Wei. On the five elements of yin and yang, one-third of the afternoon of heavenly stems belongs to the fire of the sun, and the afternoon of earthly branches belongs to the fire of the sun, which is a good ratio. Renchen: It is one of the main branches, with a rank of twenty-nine. The former is Xinmao and the latter is Guisi. On the five elements of Yin and Yang, the heavenly stems belong to Yang's water and the earthly branches belong to Yang's soil, which means that soil and water are in conflict with each other. Human voice: it is one of the main branches, ranking 39. The former is bitter and ugly, while the latter is bitter and ugly. On the five elements of Yin and Yang, the heavenly stems belong to the water of the sun, and the earthly branches belong to the wood of the sun, which is called aquatic wood.