The Yellow Emperor is the ancestor of China. Did the ancients really exist before him?

Of course, there were ancient humans before the Yellow Emperor. According to Han Feizi, in ancient times before the Yellow Emperor, there were few human beings, but there were many wild animals and birds, and human beings were often hurt by wild animals. At this time, some Koreans taught people to build nests in trees to avoid harm, and Suiren taught people to drill wood for fire and eat cooked food.