title: How does wechat choose the link's thumbnail?
body: <p>I have an issue very similar to <a href="https://stackoverflow.com/questions/22636071/wechat-sharing-how-to-change-re-share-description-and-thumbail">this issue</a>, and the accepted answer is outdated.</p>
  
  <p>Currently, when users share a link to my website, 3 cases happen:</p>
  
  <ul>
  <li>there is no image (default grey icon)</li>
  <li>there is an image that is not the intended one</li>
  <li>there is the intended image (the main article image, also referred in the meta using open graph)</li>
  </ul>
  
  <p>What's more, different users, on the same network, sharing the same article, experience different results.</p>
  
  <p>How does wechat identify which image to use as a thumbnail when sharing a link? How can one achieve a consistent behavior?</p>