There are probably several kinds:

1, recorded by historians.

2. Folk records

3. Folk circulation

Among them, many are untrue by historians because of the pressure of the ruling class. Everyone knows this, but this is already the most credible information.

People who write novels will also record some things about unofficial history, many of which are exaggerated or personal, and even he himself doesn't know what is going on, so there are also many mistakes.

Then there is folklore, the most unreliable and exaggerated one.

So in fact, many recorded ancient things are made up, and the history that modern people draw through some materials and their own inferences is actually hard to say.