In the martial arts novel " The Eight Dragons and Dragons " written by Mr. Jin Yong, the protagonist Duan Yu obtained a treasure after obtaining the Hundred Treasures Book Box. The Hundred Treasure Book Box contained all kinds of martial arts scripts and precious medicines that could improve Duan Yu's martial arts and physical fitness, making him a powerful martial arts master. However, after Duan Yu obtained the Hundred Treasures Book Box, he also realized its danger because the contents of the secret manual in the book might make him too powerful and lose control of himself to the extreme. Therefore, he continued to cultivate and was always vigilant to ensure that his martial arts and personality would not go beyond his control. As for why the Hundred Treasures Book Box would only open after Duan Yu obtained it, the novel did not explain in detail. However, it might be to show Duan Yu's growth and changes after obtaining the treasure and to let him better understand the influence of the treasure he possessed.