The reason why Hong Xiu's voice in the novel was low was probably due to the following reasons: 1. To improve the user experience: When reading a novel, a low voice can make it easier for users to focus and improve the reading experience. 2. Distraction prevention: Low volume can prevent users from being distracted by external interference and better immerse themselves in the novel. 3. Adapt to different listening levels: A low voice can help users with different listening levels better adapt to reading.