圖七:以方位對應天干地支製圖，我們得到丁未年。是此墓碑豎立的六十二年前。假設這是一個明代之墓碑，「洪門楊氏」可能出生於1607年。

圖七:Mapping the tomb onto 天干地支, we obtain 丁未, 62 years before the tomb has been erected. If a Ming tombstone, 洪門楊氏 might have been born in 1607.