In the Chinese view of life, 60 is regarded as a perfect number. The "Heavenly Stems and Earthly Branches" system of enumerating years has a 60-year cycle, which is called a shou.
在中華民族的生命觀裡，「60」被視為一個完滿數字，天干地支編年循環，週而復始，歷一甲子謂之「壽」。