diff --git a/en/application-dev/reference/errorcodes/Readme-EN.md b/en/application-dev/reference/errorcodes/Readme-EN.md
index 6fb0ba6ab8a22d3f47b0826e42d854ae62e84f62..e85f075be78194a6037ac3db44b0d379831feab0 100644
--- a/en/application-dev/reference/errorcodes/Readme-EN.md
+++ b/en/application-dev/reference/errorcodes/Readme-EN.md
@@ -55,6 +55,7 @@
   - [Network Connection Management Error Codes](errorcode-net-connection.md)
   - [Ethernet Connection Error Codes](errorcode-net-ethernet.md)
   - [Network Sharing Error Codes](errorcode-net-sharing.md)
+  - [Policy Management Error Codes](errorcode-net-policy.md)
   - [mDNS Error Codes](errorcode-net-mdns.md)
   - [Traffic Management Error Codes](errorcode-net-statistics.md)
 - Connectivity
diff --git a/en/application-dev/reference/errorcodes/errorcode-universal.md b/en/application-dev/reference/errorcodes/errorcode-universal.md
index 308f3cf3bb5e17e0ef9c2a133a52afb4ccf43d2a..27950bafa4de98bb2bca73a25d63da411ee43b6b 100644
--- a/en/application-dev/reference/errorcodes/errorcode-universal.md
+++ b/en/application-dev/reference/errorcodes/errorcode-universal.md
@@ -44,7 +44,7 @@ BusinessError 401: Parameter error. The type of "${parameterName}" must be ${val
 
 **Description**
 
-This error code is reported when a parameter error occurs.
+This error code is reported when a parameter error occurs. Regardless of whether the API is synchronous or asynchronous, this type of error is generally thrown in synchronous mode.
 
 **Possible Causes**