Since the elder was born at 6: 00 A.M. and the younger at 6: 15, it seemed they belonged to the same "shih-chen" (from 5: 00 to 7: 00 A.M.) used for the fate charts.
以這對孿生子出生時刻為例，其間相差十五分鐘，哥哥在早上六點鐘，弟弟在六點十五分，原本是屬於午前五時至七時的卯時，是同一個時辰。