According to this sentence, C fire means that a person's five-element attribute is fire, and the ugly month refers to the twelfth lunar month, which is the twelfth lunar month. In numerology, the twelfth lunar month is a cold month, so fire C is called "cold fire" in ugly months.
If a person's five-element attribute is fire, and he was born in an ugly month, then he needs water to balance his five-element attribute. Because Renshui is the official star of C fire and Jia Mu is the financial star of C fire, Renshui and Jia Mu can help C fire develop and grow. At the same time, if this person was born in different time and place, then the five elements he needs will be different.
It should be noted that numerology is only a traditional belief and cannot replace actual life and efforts. Everyone's life trajectory is influenced by many factors, including but not limited to birth time, place, family background, educational experience and so on. Therefore, even if a person's five-element attribute is unbalanced, it can't be completely attributed to fate, and it is still necessary to change his life through his own efforts and actions.