the ten Heavenly Stems ([[甲|甲|jia3]], [[乙|乙|yi3]], [[丙|丙|bing3]], [[丁|丁|ding1]], [[戊|戊|wu4]], [[己|己|ji3]], [[庚|庚|geng1]], [[辛|辛|xin1]], [[壬|壬|ren2]], [[癸|癸|gui3]]), used cyclically in the traditional Chinese calendar and as ordinal numbers