The plant is Yang wood.
In Feng Shui, Yang wood is the real wood and is the nature of the wood. The characteristics of Yang wood include being benevolent, upright, having ideas, being responsible, daring to do things, loving life and killing evil, being impartial and selfless, and being consistent in what one says and what one thinks. Catalpa wood likes fertile soil, grows rapidly, has a straight trunk and hard wood. These characteristics are in line with the characteristics of Yang wood. Therefore, Catalpa wood is considered a Yang wood.
In practical applications, Catalpa can be cultivated as ornamental trees and street trees, and its hard wood is also a good building material. These applications all reflect the sunny, upward and tough characteristics of catalpa wood.