Original link: https://www.zzxworld.com/posts/change-mysql-charset-from-utf8-to-utf8mb4
An old project at hand uses MySQL’s utf8 character set. When encountering a scene where special characters are to be saved (such as Emoji), an error such as “Incorrect string value: ‘\xX0\xXD…'” will be reported. When encountering this problem, either clean up these special contents before saving, or upgrade the character set of the database to utf8mb4.
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