The novel had already been updated for more than 1,000 chapters, and it could not be read after 400 pages. It was very likely that the author had a problem when updating the chapters. When updating a novel, the author might encounter some technical problems or editing problems that caused the chapter to update abnormally. If the novel has been updated to 400 pages but the reader is unable to continue reading, it is recommended to contact the author or the bookstore to understand the specific situation. Sometimes, the author might not be able to complete the update due to technical reasons or editing problems. Or they might need some time to reshuffle the chapter's update schedule. If you can't contact the author or the publishing company, you can try to find new content through online reading platforms or other means. If the novel is already published, you can go to a bookstore or online bookstore to see if there is an updated version of the book.