The "Heavenly Stem" is part of a traditional Chinese system used for counting years, months, days, and hours. It consists of ten elements: Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren, and Gui. These stems are often paired with the Earthly Branches, creating a 60-year cycle known as the Sexagenary Cycle. The Heavenly Stems have historical significance in Chinese culture, astrology, and calendars. They are used in various contexts, including Chinese medicine and feng shui, to determine auspicious dates and times. Understanding the Heavenly Stems is essential for interpreting traditional Chinese practices and beliefs.