Virtue, the cultivation of moral character, a gentleman not only has external ambition, laughter and joy, but also has internal noble quality and broad mind; The original meaning of "Xin" is the fragrance of flowers and trees, and it is extended to the touching virtue of a gentleman. There is a saying in the Book of Jin that "the Zhou Dynasty flourished and the Millennium was fragrant", which proves that the word "Xin" is more meaningful to later generations.