title: Why can’t search for A in Elasticsearch to find the content, but AA can
body: <p><a href="https://i.stack.imgur.com/ROoJ4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ROoJ4.png" alt="Search A" /></a>
  <a href="https://i.stack.imgur.com/cOgJv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cOgJv.png" alt="Search AA" /></a></p>
  <p>When I search for &quot;A&quot; or &quot;A 型&quot;, Elasticsearch cannot correctly read the English letter at the first position of the search string</p>