Guo Jing
Guo Jing wrote the "Nine Yin Manual" from memory during the siege of Xiangyang. He also wrote a martial arts manual for the 'Eighteen Dragon Subduing Palms'. Guo Jing also recorded all his military experiences and knowledge from the "Book of Wumu" on a piece of cloth. Both the scroll and the cloth were hidden at Taohua Island, the home of Guo Jing and Huang Rong. The co-ordinates of Taohua Island and the map to pass the maze on Taohua Island were separately hidden inside the blade of the Dragon Slaying Saber. The Heaven Reliant Sword was brought out of Xiangyang by Guo Xiang before the city was conquered, while the Dragon Slaying Saber was lost and disappeared after Guo Polu's death. The heroic deeds of Guo Jing and Huang Rong became "jianghu" legends and were occasionally mentioned in "The Heaven Sword and Dragon Saber".