2. "Zhang" refers to a kind of jade, which is divided into two halves longitudinally and shaped like a half reed.
3. Zhu Yuanzhang was originally named Zhu Chongba and later renamed Zhu Yuanzhang.
It is necessary to explain the meaning of the latter name: Zhang of Zhu Yuanzhang is a sharp weapon made of jade.
In fact, it means "kill Bird". Renaming is to strengthen the determination to destroy the yuan, which means that you are a sharp weapon to destroy the yuan.