after empress guo was deposed, her son, crown prince jiang, became apprehensive about remaining crown prince, and repeatedly requested to be replaced. emperor guangwu was initially hesitant to depose both mother and son, but in 43, he resolved to swap princes jiang's and yang's positions. he created prince jiang the prince of donghai, and created prince yang crown prince. at this time, he also changed prince yang's name to zhuang, perhaps because yang (which means "sun") is such a commonly used character that the law of naming taboo would cause the people too much trouble. the new name was not without its own problems, and many members of the zhuang clan were forced to change their names.