After a Demon Beast reaches the Golden Core Stage, it can take on human form and awaken intelligence.
At that point, it already has the ability to come into contact with the Hundred Skills of Cultivation, able to recognize the written language, illustrations, and so on of the Human Race.
Further on, Demon Beasts whose Realm is even higher, at the Nascent Soul Stage, because their lifespan is longer and their comprehension improves, will already have made some achievements in the Hundred Skills of Cultivation and gained certain accomplishments.
Compared to Human Race Cultivators learning the Hundred Skills of Cultivation, the difference is not large; some Demon Beasts, relying on the advantage of their bodies, even come with their own Beast Fire for Alchemy and Artifact Refining.
