In Yen Dang village, Thinh Thanh district, there was a rich man named Mao who inherited the property left by his ancestors and became extremely rich, with millions of dollars. He once declared to everyone that "When the Ha Giang River dries up and the night sky has no more stars, then my silver, gold and jewels will be gone". After living a life of luxury for more than 20 years, just one terrible natural disaster destroyed two-thirds of his carefully preserved property.
Too heartbroken because the shiny gold bars he had accumulated were gone forever, he immediately sought out a Taoist priest to find a way to help him overcome his bad luck and bring his fortune back to him. This village had a Taoist priest named Thong Tue, who was famous for his profound power, and was of course the first choice of the rich man Mao. After casting a hexagram, carefully calculating his date of birth, and meticulously observing his black forehead, the Taoist priest said: