How to change Auto readmore without js for Blogger

there are many way to add atuto readmore to blogspot, this is another way to add autoread more without javascript and take first image to thumnail but not change the image quality.
First step:  Find this tag ]]></b:skin> paste below code after that.

.dp-thumbnail{margin-bottom:20px;border:1px solid #ccc;box-shadow:0 0 transparent inset,0 5px 0 -4px #fff,0 5px 0 -3px #ccc;padding:10px 0;width:100%;height:90px;text-align:center}
.dp-thumbnail img{border:0;padding:0;max-width:96%;max-height:90px}
.dp-thumbnail span{font-size:26px;line-height:70px;font-weight:bold}code-box

Second step: Find <data:post.body/>  and replace it by below code:

<b:if cond='data:blog.pageType != &quot;item&quot;'>
 <b:if cond='data:blog.pageType != &quot;static_page&quot;'>
  <div class='dp-thumbnail'>
   <b:if cond='data:post.firstImageUrl'>
    <img expr:alt='data:post.title' expr:src='data:post.firstImageUrl'/>
   <b:else/>
    <b:if cond='data:post.thumbnailUrl'>
     <img expr:alt='data:post.title' expr:src='data:post.thumbnailUrl'/>
    <b:else/>
     <span>No thumbnail</span>
    </b:if>
   </b:if>
  </div>
  <data:post.snippet/>
 <b:else/>
  <data:post.body/>
 </b:if>
<b:else/>
 <data:post.body/>
</b:if>code-box

That done, enjoy with it.