子丑寅卯辰巳午未申酉戌亥

Saw these words "子丑寅卯辰巳午未申酉戌亥" on a tin can of Malaysian Pineapple tarts in the office. Why are these words even on the tin can? It is a Chinese numbering system that counts to 12 and it is usually associated with fortune telling and Fung Tsui these days. I cannot help but think of 画鬼画符 in the process. Maybe I should print some amulets for good luck. Hmmm....