diff --git a/ChatQnA/README.md b/ChatQnA/README.md
index f01e252a5..3afb751ad 100644
--- a/ChatQnA/README.md
+++ b/ChatQnA/README.md
@@ -72,9 +72,9 @@ docker pull opea/chatqna-ui:latest
 
 In following cases, you could build docker image from source by yourself.
 
-- Failed to download the docker image.
+- Failed to download the docker image. (The essential Docker image `opea/nginx` has not yet been released, users need to build this image first)
 
-- Use the latest or special version.
+- If you want to use a specific version of Docker image.
 
 Please refer to the 'Build Docker Images' in [Guide](docker_compose/intel/cpu/xeon/README.md).
 
diff --git a/ChatQnA/docker_compose/intel/cpu/xeon/README.md b/ChatQnA/docker_compose/intel/cpu/xeon/README.md
index 3bab9a935..4353583c7 100644
--- a/ChatQnA/docker_compose/intel/cpu/xeon/README.md
+++ b/ChatQnA/docker_compose/intel/cpu/xeon/README.md
@@ -49,9 +49,9 @@ docker pull opea/chatqna-ui:latest
 
 In following cases, you could build docker image from source by yourself.
 
-- Failed to download the docker image.
+- Failed to download the docker image. (The essential Docker image `opea/nginx` has not yet been released, users need to build this image first)
 
-- Use the latest or special version.
+- If you want to use a specific version of Docker image.
 
 Please refer to 'Build Docker Images' in below.
 
diff --git a/ChatQnA/docker_compose/intel/hpu/gaudi/README.md b/ChatQnA/docker_compose/intel/hpu/gaudi/README.md
index 82df9f37d..bd5a79085 100644
--- a/ChatQnA/docker_compose/intel/hpu/gaudi/README.md
+++ b/ChatQnA/docker_compose/intel/hpu/gaudi/README.md
@@ -50,9 +50,9 @@ docker pull opea/chatqna-ui:latest
 
 In following cases, you could build docker image from source by yourself.
 
-- Failed to download the docker image.
+- Failed to download the docker image. (The essential Docker image `opea/nginx` has not yet been released, users need to build this image first)
 
-- Use the latest or special version.
+- If you want to use a specific version of Docker image.
 
 Please refer to 'Build Docker Images' in below.
 
diff --git a/ChatQnA/docker_compose/nvidia/gpu/README.md b/ChatQnA/docker_compose/nvidia/gpu/README.md
index 01cd98814..8df3dbf80 100644
--- a/ChatQnA/docker_compose/nvidia/gpu/README.md
+++ b/ChatQnA/docker_compose/nvidia/gpu/README.md
@@ -50,9 +50,9 @@ docker pull opea/chatqna-ui:latest
 
 In following cases, you could build docker image from source by yourself.
 
-- Failed to download the docker image.
+- Failed to download the docker image. (The essential Docker image `opea/nginx` has not yet been released, users need to build this image first)
 
-- Use the latest or special version.
+- If you want to use a specific version of Docker image.
 
 Please refer to 'Build Docker Images' in below.