Why are Zhu Yuanzhang's sons' names beside the wooden characters?

Zhu Yuanzhang named his son with wood as the side, which has no special significance, but wood symbolizes wealth. With wood, he can take root and flourish, and he hopes that his descendants will be prosperous forever. But in fact, it didn't end. Hundreds of years later, a great prime minister appeared, which was enough to comfort Comrade Zhu Yuanzhang's spirit in heaven.

There is another meaning next to the word "wood", which means that the five elements coexist. Zhu Yuanzhang stipulated that the third word in the names of children and grandchildren should be specified in strict accordance with the order of "fire, earth, gold, water and wood" (please note that this is the order in which the five elements coexist, not the order in which the five elements coexist). Fire comes first, wood is fire, so the first generation of Zhu Yuanzhang's descendants all take wood as the radical.