Are there any Chiyou, Yan Di and Huangdi in history? Legend has it that Chiyou has three heads and six arms. Is it true?/You don't say.

Records of the Five Emperors recorded Chiyou, the Yellow Emperor. It is famous for its failure in the war with the Yellow Emperor. He is the chief of the ancient Jiuli tribe and the god of war in China mythology. He fought against Yandi and defeated Yandi, so Yandi and Huangdi teamed up against Chiyou. Eighty-one brother transferred troops to Chiyou to lead a fierce battle with the Yellow Emperor in Zhuolu. Legend has it that Chiyou has eight legs, three heads and six arms, a bronze head and an iron forehead, and is invulnerable. He is good at fighting with knives, axes and swords. He is immortal and brave. He is also the ancestor of the Han nationality, but Chiyou's superhuman powers are just legends.