Its full name is Di Qing Three Times to Get Pearl Flag, the content is drawn from classical novel Five Generals conquered the West. In northern Song Dynasty the famous general Di Qing was to borrow a magic weapon- the unbeatable pearl’s flag to kill enemies. During the period, he communicated with Princess Shuangyan back and forth wisely, and finally they fell in love each other and got married. After that Princess Shuangyan assisted her husband to resist the enemies with the help of the Pearl Flag and achieved many successful battlements.