Since ancient times, China has had 10-day stems and 12-day branches, referred to as "stems and branches", which means stems and branches of trees.

Ten days' work: A, B, C, D, E (W), F, G, F, N, G;

The twelve earthly branches are Zi, Ugly, Yin, Mao (mǐo), Chen, Si (sǐ), Wu, Wei (wèi), Shen, You (yǒu), Xu (xū) and Hai.

The twelve branches correspond to the zodiac:

Rats, ugly cows, silver tigers, hairy rabbits, dragons, snakes, afternoon horses, sheep, monkeys, chickens, dogs and pigs.

The least common multiple of 10 and 12 is 60, so the combination of 10 aerial trunk and 12 terrestrial branch (odd bits with odd bits and even bits with spouse bits) can form at least 60 bits, thus forming 60 branches, which are called "sextuples" because they start with Jia.

1 .jiazi 2. Ugly B 3 Bing Yin 4. Ding Mao 5. Chen Wu 6. Keith 7. Wu Geng 8. Wei Xin 9. Ren Shen 10. Gui You

1 1. JOE 12. Yihai 13. Bing Zi 14. Ding Chou 15. Wuyin 16. Bazaar 17. Chen Geng 65438.

2 1. Shen Jia 22. Yiyou 23. Xu Bing 24. Ding hai 25. Woods 26. Ji Chou 27. Geng Yin 28. Xinmao 29. Yan Chen 30. Guisi

3 1. Wu Jia 32. A micro 33. Shen Bing 34. Dingyou 35. The reform movement of 1898. Jihai 37. Gengzi 38. Xin Chou 39. Ren Yin 40. Guimao.

4 1 .Chen Jia 42. Yisi 43. Bingwu 44. Ding Wei 45. Wu Shen 46. Ji You 47. Geng Xu 48. Xinhai 49. Renzi 50. Ugly.

5 1 .52 good news. Mao yi 53. Chen Bing 54. Ding si 55 Five, five, six Wiki 57. Geng Shen 58. Heart has 59. Ren Xu 60. Guihai

Therefore, "when the sky dies, Huang Tian should stand; Year in Jiazi, the world is prosperous ",which means year, as we said in 20 13." Hope to adopt.