& Amp; 22823; & amp; 29233; what encoding is this? How to solve

& Amp; #22823; & amp; #29233; what encoding is this? It's not utf8, it's not like gbk, it's like a unicode internal code, PHPcodeecho '& amp; #22823; & amp; #29233;'; //, this is html entity character. What is this code?
It's not utf8. it's not like gbk.

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It seems to be a unicode internal code
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PHP code

Echo 'loan'; // loose, which is in the form of html entity characters and uses Unicode encoding
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It seems that the gbk code is printed during utf8 interpretation.
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Http://www.w3school.com.cn/html/html_entities.asp