Dasong is the Song Dynasty. Song Dynasty (960-1279) is a dynasty in the history of China, which is divided into two stages: the Northern Song Dynasty and the Southern Song Dynasty. It lasted 18 emperor and enjoyed the country for 3 19 years. The Song Dynasty was an era of high prosperity in commodity economy, culture, education and scientific innovation in the history of China.

When Zhao Kuangyin acceded to the throne, he wrote a letter to "the Tang-Wu Revolution in the past, and formulated a large size to adapt to the founding of the People's Han and Tang Dynasties. It was appropriate to call the country" Da Song "because of its initial seal. Because before Zhao Kuangyin acceded to the throne, it was time for us to return Songzhou to the German army, so we decided on this country name. Because the royal family is surnamed Zhao, it is also called, and because Wude said at the end that the Song Dynasty was a fire virtue, it was nicknamed "Fire Song" and "Yan Song". Because Zhao's county is Tianshui, modern historian Chen Yinque called the Song Dynasty "Tianshui Zeng".