Why is the earth called the earth? This is a meaningless question. Well, let me quote some information to explain:
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"Old Summer Palace" was named by Emperor Kangxi. The three-character plaque of Xuanye's imperial book hangs above the lintel of the Yuanmingyuan Palace. Emperor Yongzheng had an explanation for the name of this garden. He said that the meaning of the word "Yuan Ming" is: "Round and enchanting, a gentleman is in the middle of his time; bright and universally illuminating, a person's wisdom." It means, "round" "Ming" means that the personal moral character is perfect and beyond ordinary people; "Ming" means that the political performance is bright and perfect, and it is perfect and wise. This can be said to be the ideal standard used by the ruling class in the feudal era to advertise wise kings and virtuous ministers.
In addition, "Yuanming" is the Buddhist title that Emperor Yongzheng has used since his prince period. Emperor Yongzheng believed in Buddhism and was known as "Yuanming layman" and had in-depth research on Buddhism. He is the author of 19 volumes of "Yu Selection Quotations" and "Yu Zhi Demon Selection and Differentiation Records". In the structure of Buddhist sects in the early Qing Dynasty, Emperor Yongzheng regarded himself as the master of Zen and exerted influence on Buddhism as the "Lord of the World". He worked hard to advocate the "unity of three religions" and "the unification of Zen purity". This was the first step in the history of the development of Buddhism. Very important person. When Emperor Kangxi gave the garden to Yinzhen (later Emperor Yongzheng), he named the garden "Yuanmingyuan", which was taken from Yongzheng's Buddhist name "Yuanming".
The above is quoted from what others have said.
In ancient times, naming of buildings was very particular. Each word can be said to be extracted from a passage and serve as the meaning of the original sentence. Why should we choose "Yuan Ming"? This is obvious.