Sophora japonica is not only a symbol of good fortune, but also a symbol of wealth. In ancient times, Sophora japonica was planted in the courtyard of wealthy families, which meant that the family was rich and healthy, and it also meant that the family would be more and more prosperous in the future.
Black Sophora japonica is a kind of Sophora japonica, which is native to China. In order to distinguish it from Robinia pseudoacacia in North America, it is also called Sophora japonica and Sophora japonica. Solemnly declare: the answer is for reference only, please don't be blindly superstitious.