diff --git a/markdown/RTC 4.x/release-notes/en-US/native/release_ios_ng.md b/markdown/RTC 4.x/release-notes/en-US/native/release_ios_ng.md
index 150ccd3c969..4e7130cd479 100644
--- a/markdown/RTC 4.x/release-notes/en-US/native/release_ios_ng.md	
+++ b/markdown/RTC 4.x/release-notes/en-US/native/release_ios_ng.md	
@@ -20,7 +20,7 @@ v4.2.3 was released on September xx, 2023.
 
    Before using advanced features, you can check whether the current device supports these features based on the call result. This helps to avoid performance degradation or unavailable features when enabling advanced features on low-end devices. Based on the return value of this method, you can decide whether to display or enable the corresponding feature button, or notify the user when the device's capabilities are insufficient.
 
-   In addition, since this version, calling `enableVirtualBackground` and `setBeautyEffectOptions` automatically triggers a test on the capability of the current device. When the device is considered underperformed, the error code -4 is returned, indicating the device does not support the feature.
+   In addition, since this version, calling `enableVirtualBackground` and `setBeautyEffectOptions` automatically triggers a test on the capability of the current device. When the device is considered underperformed, the error code `-4` is returned, indicating the device does not support the feature.
 
 #### Improvements
 
diff --git a/markdown/RTC 4.x/release-notes/en-US/native/release_mac_ng.md b/markdown/RTC 4.x/release-notes/en-US/native/release_mac_ng.md
index e8bb15600cd..189da7ac43d 100644
--- a/markdown/RTC 4.x/release-notes/en-US/native/release_mac_ng.md	
+++ b/markdown/RTC 4.x/release-notes/en-US/native/release_mac_ng.md	
@@ -21,7 +21,7 @@ v4.2.3 was released on September xx, 2023.
 
    Before using advanced features, you can check whether the current device supports these features based on the call result. This helps to avoid performance degradation or unavailable features when enabling advanced features on low-end devices. Based on the return value of this method, you can decide whether to display or enable the corresponding feature button, or notify the user when the device's capabilities are insufficient.
 
-   In addition, since this version, calling `enableVirtualBackground` and `setBeautyEffectOptions` automatically triggers a test on the capability of the current device. When the device is considered underperformed, the error code -4 is returned, indicating the device does not support the feature.
+   In addition, since this version, calling `enableVirtualBackground` and `setBeautyEffectOptions` automatically triggers a test on the capability of the current device. When the device is considered underperformed, the error code `-4` is returned, indicating the device does not support the feature.
 
 #### Improvements