What is the scientific explanation of "mulberry dates, pear trees and locust trees are not suitable for entering the house"?

Mulberry, jujube, Eucommia ulmoides, pear and Sophora japonica can't be pillars in the house. Because these trees are sweet, insects will bite, and the water is big and easy to crack.

In the early years, there was a saying that "pine, cypress, mulberry, pear and locust are not allowed to enter the palace". So is his family. For example, conifers and poplars can't be planted in the yard, because they are planted in shady houses, usually cemeteries.

Pear trees can't be planted, mainly to avoid homophonic, "pear" and "separation" homophonic, and family living together means reunion and can't be "separated". Sophora japonica can't be planted in the yard, because there is a bug falling from the locust tree, commonly known as "ghost hanging". People are worried that passers-by will say, "Why are there so many ghosts in this family?" .

"Mulberry" and "mourning" are homophonic, so there are no mulberry trees in the yard. Another way of saying it is that "the three stoves are the only ones, and they can't enter the Yangtze River", which is also the truth. In the courtyard of Beijing, jujube trees, begonia and pomegranate are planted more frequently, symbolizing "spring comes and autumn fruits come" and "many children are blessed". "Pomegranate fish tanks in skyscrapers, fat dogs and fat girls" is a typical symbol of Beijing quadrangles in the early years.

Extended data:

1. There are not many people in the house.

Apricots are slightly toxic. If apricot trees are tall and lush, they are not good for the elderly, children and weak people. There is also a saying that almonds are poisonous because they may be eaten.

2. Planting trees in ancestral graves is for children and grandchildren, and five trees become forests and auspicious clouds.

This is mainly because trees are valuable. Planting trees can build houses and marry.

3. The flowers with thorns can't be put in the house, but planted by the wall.