Yii2 will automatically add the & #039; character to me. What is the problem?

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'Yes', the data after UTF-8 escape;
Here I will show you that it is a quotation mark. You can edit this answer to view it.
For security purposes, it is displayed as this way, but it is not displayed if it is opened in the browser. It shows normal content and has nothing to do with it.
Click the preview button instead of the response button.