《黄帝内经·素问·六元正纪大论》
甲子年、甲午年：上为少阴君火司天；中为太宫土运太过；下为阳明燥金在泉。
甲子、甲午岁：上少阴火，中太宫土运，下阳明金。
Jiazi year, Jiawu year: Lesser Yin Monarch Fire is at heaven; Excessive Tai Palace Earth Movement is in the middle; Yangming Drying Metal is at spring.