When the timestamp turns the time, why is there a difference of one hour?

there is a difference of one hour when a timestamp is converted to Beijing on different systems. what is the reason?

timestamp: 516466800

I don"t understand why. Please give me some advice.

System macbook ios
May.09,2022

the correct time should be the second 14th, and the first is an extra hour due to daylight saving time

.

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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-64f5-42b8b89-68ed.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-42b8b89-68ed.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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