According to legend there is a person called the moon palace, wu gang is the han dynasty, kosi who follow order immortal, in heaven, but he made a mistake, fairy relegated him to the moon palace, cut down every day in front of the moon palace osmanthus, as a punishment. The osmanthus tree grow thickly, has more than five hundred high, cut down after each time, will be cut down and closed immediately. Li bai in du cui si wen brothers family wrote a poem: "pay to guangxi in rationalism, hold for cold".