In fact, this sentence is only the first half of the sentence, which comes from the ternary nine-luck theory of Feng Shui. China Feng Shui came down in one continuous line to become a master in Song Dynasty. This paper mainly studies the relationship between living environment and gossip. 20 years is luck, 60 years is a dollar, and ternary 180 is just a round of gossip. Therefore, even the best feng shui only needs three yuan, and after three yuan, it will be transferred to other places. So there is an old saying in China, well said, you are not rich for three generations.
The latter sentence was casually added by later generations.
Some people also say: the wind and water turn, come to my house next year.
We need to know the periodic change law of the "Three-Yuan Nine-Games":
Minor reform: annual reform;
Changes in China: changes in 20 years; Great changes: a change in 60 years;
Bigger change: one change in 60×3 = 180 (that is, three yuan and nine luck);
180× 3 = one change in 540 years;
540×3= 1620;