Is there a market for traditional overhead historical novels?

It is not real history that ignores history. Historical crossing must change history according to the author's preference. Historical novels must conform to historical facts. Even if there is a deduction of doubtful historical events, it cannot obviously violate the established historical facts. These are three systems. How to compare?

For example, historical novels are biographies, historical travel novels are whoring articles, and overhead historical novels imitate real people to "create people". Both of them take Wu Zetian as the prototype, restore Wu Zetian according to historical data, prostitute Wu Zetian according to unofficial history, and create a character similar to Wu Zetian according to imagination. Which is better or worse?