The combination of pentyl and decyl is the combination of heavenly stems and earthly branches. Pentyl and decyl are hydrated into fire, which symbolizes warmth and is conducive to the growth of all things. In human numerology, the combination of Pentium and Cassia represents the expression of people's reputation, knowledge and talent. Fire is a symbol of light and enthusiasm. The combined person has a positive mental state, is good at expressing and communicating, and has strong social skills and leadership skills. It is also easier to gain recognition and appreciation from others.