Use the pdf generated by puppeteer to convert to base64 and then part of the Chinese coding error

the pdf buffer generated by crawling the page in ubuntu is converted into base64 and then put to oss to generate a preview link to find that some Chinese fonts are displayed as blank, but the downloaded pdf file can be displayed normally after comparison, it is found that the encoding of the blank part of the Chinese font is different from that of normal Chinese character decode, but it can be decoded normally. For example, the word "day" is normally encoded as% e6% 97% a5 and captured by puppeteer as% e2% bd% 87, but it can be decoded normally. There is no such situation in mac computer, is there any god who can help?

Mar.28,2021
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-64f5-1b304e7-2bd1d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b304e7-2bd1d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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