Among them, "C A" refers to fire C and wooden armor, which are two important eight-character factors in China's traditional numerology, representing fire and wood respectively. C fire represents people's intelligence, creativity and courage in the eight characters, while Jia Mu represents people's morality, leadership and sense of responsibility. If a person's eight characters are both C and A, it shows that his intelligence and morality are excellent and he can become an influential figure.
"Peach Blossom Man" refers to a person who is as beautiful, elegant and temperamental as a peach blossom. So the whole sentence means that if a person can understand both C and A, then he is a talented, intelligent and virtuous person who can be as beautiful, elegant and temperament as a peach blossom.