Ren Yin Gui Mao Jin Bo Jin (壬寅癸卯金箔金) refers to the phase where Yin (寅) and Mao (卯) are the places of wood prosperity. When wood prospers, metal is weakened. Additionally, metal is exhausted in Yin (寅) and in the fetal stage in Mao (卯). Since the metal lacks strength, it is referred to as Jin Bo Jin (金箔金), meaning "gold foil metal."