phpcmsv9 - phpcms v9 thumbnail blurry

phpcms v9 intends to call the thumbnail as the slideshow image, but the thumbnail is very blurry

Already followed the online method

<code>注释 else imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height,  $srcwidth, $srcheight); 
修改 $imagefun($thumbimg, $filename,90);</code>

Tested in various ways, but still doesn’t work

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phpcms v9 intends to call the thumbnail as the slideshow image, but the thumbnail is very blurry

Already followed the online method

<code>注释 else imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height,  $srcwidth, $srcheight); 
修改 $imagefun($thumbimg, $filename,90);</code>

Tested in various ways, but still doesn’t work