The character 昇 is an old form of 升, meaning the sun rising.
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昇 is an older written form of 升 (to rise). It is no longer used as a general word in mainland Chinese, but stays alive in personal and place names and in Taiwan and Hong Kong usage. The 日 on top makes the sunrise meaning explicit.
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Onomastic and traditional; in everyday mainland text 升 is written instead.
