dì​zhī

the 12 earthly branches 子[zǐ], 丑[chǒu], 寅[yín], 卯[mǎo], 辰[chén], 巳[sì], 午[wǔ], 未[wèi], 申[shēn], 酉[yǒu], 戌[xū], 亥[hài], used cyclically in the calendar and as ordinal numbers I, II etc