When time permits, I always enjoy your East Asian views of history, my friend. As to what I think about Taoism?
"Taoism absorbed elements of Buddhism, animism, shamanism, Islam, and Christianity according to the passage of time, and as a result, it composed various appearances and colors."
"However, still the most fundamental belief of Taoism is that China is the foundation and center of the universe and the world."
You know, without apology, I am a disciple of Christ, with a Judeo-Christian worldview. I have only a passing interest in the various alternative philosophies, as I believe they are ultimately false. At one time in my early adult life, desperately trying to reconcile all of the competing philosophies I encountered, e.g. a very dedicated member of the Brahman caste in India, I believed that God judged man by his "successfully" living his life by what he believed to be the Truth.
I came to a dramatically different conclusion in 1984 and have never waivered since - there is one true God, who has provided one and only one solution to man's most fundamental challenge and problem.
From your post, Taoism appears to be a "mishmash" of man's efforts to come up with any other possible alternative. Man's rebellion against the Truth is ancient and Taoism is no exception. Added to that the notion that China is the "center of the universe" is just (fill in the blank) ... 😏😉
What I would find interesting, if it has ever been attempted, is to research the true history of China, from the time of the Flood to the time frame you cover in your post. That is, one of his sons left the Ark and his father's influence and became the ancestral forebearer of all you have written here.
My far greater interest is closer to home and the relentless destruction of what I believe is our American heritage, by forces which are ultimately atheistic and communistic. Sadly, they have made great progress. Likely with considerable funding and support, from China ...
Until next time, all the best to you @goldgrifin007!
P.S. I do not agree with ValuedCustomers presentation of the history of America which you cite at the beginning of your post.