Lu Changyuan is Zhang Chang, a political figure in the late Yuan Dynasty and early Ming Dynasty, and a former minister of the Yuan Dynasty. He was an official of the Ming Dynasty, and served as a knowledgeable and talented official in Zhongshu Province. Pretending to be a Mongolian courtier.

When Zhu Yuanzhang allowed those who had surrendered before to return to the North, Zhang Chang secretly wrote a private book to investigate whether his son was alive or dead. After yang xian got the book, he sent someone to investigate. On the back of the book, Zhang Chang capitalized "I am in the south of the Yangtze River and my heart is in the north", so Zhu Yuanzhang was right.

Zhang Chang's life:

Zhang Chang, a native of Wanping, Beiping, was an official of the Ministry of Finance in the Yuan Dynasty, and later came to the Southern Wu State ruled by Zhu Yuanzhang. Zhu Yuanzhang met with him and was silent at first. Later, I saw that he was unruly, so I stayed in Wu and taught him to participate in politics there.

Zhang Chang was sincere outside and scheming inside, making friends with Zhu Yuanzhang's ministers, such as yang xian and Hu. Zhang Chang is brilliant, extremely clever and familiar with allusions of past dynasties. However, whenever the country builds a system, it has more hands, and it is in power, and things are not delayed.