diff --git a/help/_posts/1970-01-01-mysql.md b/help/_posts/1970-01-01-mysql.md
index 8ac0311..6839eef 100644
--- a/help/_posts/1970-01-01-mysql.md
+++ b/help/_posts/1970-01-01-mysql.md
@@ -48,15 +48,13 @@ deb https://{%endraw%}{{ site.hostname }}{%raw%}/mysql/apt/{{os_name}} {{release
 
 新建 `/etc/yum.repos.d/mysql-community.repo`，内容如下：
 
-注：`mysql-8.0`, `mysql-connectors`和`mysql-tools`在RHEL 7/8上还提供了`aarch64`版本。
+注：`mysql-8.0`, `mysql-connectors`和`mysql-tools`在RHEL 7上还提供了`aarch64`版本。
 
 <form class="form-inline">
 <div class="form-group">
 	<label>你的CentOS/RHEL版本: </label>
 	<select class="form-control release-select" data-template="#yum-template" data-target="#yum-content">
-		<option data-release="el6">CentOS/RHEL 6</option>
 		<option data-release="el7" selected>CentOS/RHEL 7</option>
-		<option data-release="el8">CentOS/RHEL 8</option>
 	</select>
 </div>
 </form>