The vast majority of popular wuxia stories are set no earlier than the Sung Dynasty. Most wuxia stories of note are set in the Sung, Yuan, Ming, or Qing eras. Years ago, fans at the Yushy Forum speculated that the reason for this is that the period of Chinese history prior to the Sung Dynasty is dominated by myths and legends of supernatural beings (such as the monkey god Sunwukong, etc.) and thus, even the most powerful human martial arts would look insignificant compared to the supernatural powers of gods and demons. Do you buy this as the main reason that very few wuxia stories are set before the Sung Dynasty, or are there better reasons?