Biography of Liu Yu Part 2(31)

Reference materials:
1. Book of the Song Dynasty, Vol. 1
2. Was Liu Yu a Xiongnu? VIP journal
4. Public and private economy, the key to politics China National Knowledge Infrastructure
5. Xu Qibiao, Liu Yu. Military Science Press
6. Book of the Song Dynasty, Volume 1, the first in the Century
7. New Book of Tang Dynasty · Volume 59 · Annals 49]
8. The Book of Song Dynasty, the Third Book of this Period, under the Reign of Emperor Wu, Chinese Academic website

9. Bai Shouyi, General History of China. Shanghai People's Publishing House.1989.4.
10. Book of the Song Dynasty, Volume 1, The First of This Century, Chinese Studies Website [
11. Hu Sansheng's note on "Zi Zhi Tong Jian · Volume 119 · Song Ji I"
Shen Qiwei. Detailed description of the Jin and Southern and Northern Dynasties. Shanghai People's Publishing House.2003-03.
13. Tianshi · Volume 3 · Thirty-six Cases of Disabled Persons