There were a few reasons why Qidian's novels were not listed in the update list: The update time of Qidian's update list was not fixed. It would be adjusted according to the author's update speed and the reader's feedback. Therefore, sometimes novels that updated faster would be ranked at the front of the update list while novels that updated slower would be ranked at the back. The update list of 2 Qidian was automatically generated. It would take into account factors such as the update time of the novel, the author's release time, and the reader's reading volume. Therefore, sometimes the novel's update time was earlier or the readers read less, which would cause it to have a lower position on the update list. 3. The updated content of the novel may be deleted or adjusted by the Qidian administrator, causing the update list to not reflect the latest situation of the novel correctly. To sum up, if a novel that was updated by Qidian was not listed in the update list, factors such as the novel's update time, the author's release time, the reader's reading volume, Qidian's update strategy, and the administrator's operation had to be considered.