Ritually castrated, he was trained as an imperial eunuchassigned to the court of Zhu Di, the bellicose Prince of Yan.

• 1382年，汉人军队赶走蒙古人时将他俘掳，依例阉割之后，训练他成为一名太监，指派到好战的燕王朱棣宫廷中。