diff --git a/en-US/dita/RTC-NG/API/api_irtcengine_statechanged.dita b/en-US/dita/RTC-NG/API/api_irtcengine_statechanged.dita
index 9459aeee46e..24678f3b0d6 100644
--- a/en-US/dita/RTC-NG/API/api_irtcengine_statechanged.dita
+++ b/en-US/dita/RTC-NG/API/api_irtcengine_statechanged.dita
@@ -50,7 +50,7 @@
Media device states:
- 0: The device is ready for use.
- 1: The device is in use.
- - 3: The device is plugged in.
+ - 3: The device is plugged in.
- 8: The devive is disconnected.
diff --git a/en-US/dita/RTC-NG/API/class_virtualbackgroundsource.dita b/en-US/dita/RTC-NG/API/class_virtualbackgroundsource.dita
index 4c7f7fead0f..3546076ade2 100644
--- a/en-US/dita/RTC-NG/API/class_virtualbackgroundsource.dita
+++ b/en-US/dita/RTC-NG/API/class_virtualbackgroundsource.dita
@@ -143,7 +143,7 @@ struct FVirtualBackgroundSource
backgroundSourceType
background_source_type
The custom background. See .
- - (0): Process the background as alpha information without replacement, only separating the portrait and the background. After setting this value, you can call to implement the picture-in-picture effect.
+ - (0): Process the background as alpha data without replacement, only separating the portrait and the background. After setting this value, you can call to implement the picture-in-picture effect.
- (1): (Default) The background image is a solid color.
- (2): The background image is a file in PNG or JPG format.
- (3): The background is a blurred version of the original background.
diff --git a/en-US/dita/RTC-NG/API/enum_backgroundsourcetype.dita b/en-US/dita/RTC-NG/API/enum_backgroundsourcetype.dita
index 803e50f14f5..fc67f03a683 100644
--- a/en-US/dita/RTC-NG/API/enum_backgroundsourcetype.dita
+++ b/en-US/dita/RTC-NG/API/enum_backgroundsourcetype.dita
@@ -9,7 +9,7 @@
- 0: Process the background as alpha information without replacement, only separating the portrait and the background. After setting this value, you can call to implement the picture-in-picture effect.
+ 0: Process the background as alpha data without replacement, only separating the portrait and the background. After setting this value, you can call to implement the picture-in-picture effect.
diff --git a/en-US/dita/RTC-NG/API/enum_mediadevicestatetype.dita b/en-US/dita/RTC-NG/API/enum_mediadevicestatetype.dita
index 775052b5d05..c1110b9c492 100644
--- a/en-US/dita/RTC-NG/API/enum_mediadevicestatetype.dita
+++ b/en-US/dita/RTC-NG/API/enum_mediadevicestatetype.dita
@@ -19,7 +19,7 @@
2: The device is disabled.
-
+
3: The device is plugged in.