There are seven elms in the house in Little Shenyang. Why not eight?

Seven was considered an auspicious number at that time. Some important people or places will use the number seven to express their elegance and dignity. Elms are planted around the bat pond. At the end of spring, elm money fell into the bat pond one after another. Because money falls into the pool, the bat pool also has another name for cornucopia. The homonym of "Bat Pool Borrowing Money for Lucky" means * * * wishing the master good luck and wealth. Elms were planted around the Bat Pond, and the elm money fell into the pond when it fell, so at that time, Little Shenyang once said that the money on the ground was mine in Little Shenyang, and even the money falling from the sky was mine in Little Shenyang.