diff --git a/data/kybackup/en_US/index.md b/data/kybackup/en_US/index.md
index 71dec09..9bd6891 100644
--- a/data/kybackup/en_US/index.md
+++ b/data/kybackup/en_US/index.md
@@ -67,6 +67,8 @@ Checking success, then click the "Next" button to enter the page of restore, to
 
 ![Fig 7 Data backup-big](image/7.png)
 
+Note:``、$()、;、&、| etc. The symbols that can contain and execute system commands or used for continuous execution of system commands are added to the blacklist, and the name of the directory to be backed up is judged before backup. If the symbols in the blacklist are included, backup is not allowed.
+
 Click "Start Backup" and enter the backup path selection page. As shown in figure 8.
 
 ![Fig 8 Specify directories or files -big](image/8.png)
diff --git a/data/kybackup/zh_CN/index.md b/data/kybackup/zh_CN/index.md
index aa07c72..61865a4 100644
--- a/data/kybackup/zh_CN/index.md
+++ b/data/kybackup/zh_CN/index.md
@@ -66,6 +66,8 @@
 
 ![图 7 数据备份主界面-big](image/7.png)
 
+注：``、$()、;、&、|等可以包含并执行系统命令或用于连续执行系统命令的符号加入黑名单，在备份前对要备份的目录名称进行判断，若包含有黑名单中的符号，则不允许进行备份。
+
 单击“开始备份”按钮，进入备份路径选择页面。如图8所示。
 
 ![图 8 数据备份路径选择-big](image/8.png)