How did loong's totem come from?

Some scholars believe that after the Yellow Emperor unified the Central Plains, a "totem of tribal alliances-dragon" was formed, with snakes as the main body, fish scales as the long forest, fish tails as the dragon tail, lion heads as the dragon head, antlers as the dragon horns, and eagle claws as the dragon claws (Yu Naichang and Xia Min, The Religious and Aesthetic Madness of Primitive People, page 77, Qinghai People's Publishing House, 6544. There are also studies that "Chinese tribes used to use snakes as totems". Later, the powerful clans annexed other clans, and added the most wonderful part of the defeated totem to their own totems as their new totems, forming strange-legged snakes, horseheads, antlers, fish scales and so on. This is the new totem of Chinese tribes-dragon (Wang Qingxin's new book "The Taste of China", page 3, popular science Kang Liang and Kang Yu think that "after the Yellow Emperor unified all clans and tribes and became the first emperor of China-Xuanyuan Yellow Emperor, he took the advantages of the totems of all clans and tribes and put the snake body, antlers, talons, centipede tails, tiger heads, shrimp eyes, horse teeth and rams.