Where did the dragon totem come from in our country?

Some scholars believe that after the Yellow Emperor unified the Central Plains, he "collected the specialties of various totems and determined that: snakes are the main body, fish scales are dragon scales, fish tails are dragon tails, lion heads are dragon heads, and deer antlers are It is the dragon horn, and the eagle claw is the dragon claw, which constitutes the totem of the tribal alliance - the dragon." (Yu Naichang and Xia Min, "The Religion and Aesthetic Madness of the Early People", page 77, Qinghai People's Publishing House, December 1994 1 edition); some research also believes that "Chinese tribes originally used snakes as totems." Later, powerful clans annexed other clans and added the most exciting parts of the defeated totems to their own totems as their own new ones. Totems are formed into strange snakes with animal legs, horse heads, deer antlers, fish scales, etc. This is the new totem of the Chinese tribes - dragon (page 3 of Wang Qing's new book "Chinese Taste", Popular Science Publisher Guangzhou Branch, November 1989, first edition); Kang Liang and Kang Yu believe that "After the Yellow Emperor unified the clans and tribes and became the first emperor of China, Xuanyuan Huangdi, he took the strengths of the totems of each clan and tribe and transformed the snake body into a snake body. , antlers, eagle claws, centipede tail, tiger head, shrimp eyes, horse teeth, ram's whiskers, etc. are combined in one totem to form a 'dragon' totem" (page 6 of "Feng Shui and the City" by Kang Liang and Kang Yu, Baihua Literature and Art Publishing House, February 1999, first edition