Why are Chinese numbers not classified as Decimal Number? in unicode

Hello, I am a beginner of Unicode. Look it up on the Unicode web site and list the words of all the numbers.
Unicode (General_Category=Decimal_Number)

I have a question: why are the numbers in Chinese not included and classified according to what criteria?

Number unicode
Mar.29,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e518ef-4513f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e518ef-4513f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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