However, while the famous novel "Romance of the Three Kingdoms" by Luo Guanzhong describes him as wielding the guandao, this description may have been an anachronistic one intended to make the character seem more imposing: historically speaking there was no evidence to show that Guan Yu used the weapon that is thus attributed to him, and indeed there is no indication of the existence of what is now known as the guandao prior to the 11th century, when it was first illustrated in the military manual "Wujing Zongyao". The guandao, therefore, possibly did not even exist during Guan Yu's era, meaning that it could be somewhat of a pop culture-derived misnomer. Furthermore, the scholar Tao Hongjing (456-536 AD) recorded in the "Gujin Daojianlu" (古今刀劍錄, "A Catalogue of Ancient and Modern Sabers and Rapiers") that Guan Yu forged a pair of sabres using iron ore he harvested from Wudushan mountain (武都山) himself, which may have inspired the story that Guan Yu invented his weapon. However, this would also indicate that he did not use a guandao or even anything resembling a guandao, since the pole-mounted or long handled dao weapons such as the pudao or dadao were all wielded with two hands and so would not have been made or used in a pair.