diff --git a/comps/reranks/README.md b/comps/reranks/README.md
index f8f12251e..ac3ab3f78 100644
--- a/comps/reranks/README.md
+++ b/comps/reranks/README.md
@@ -19,10 +19,10 @@ export HF_TOKEN=${your_hf_api_token}
 export LANGCHAIN_TRACING_V2=true
 export LANGCHAIN_API_KEY=${your_langchain_api_key}
 export LANGCHAIN_PROJECT="opea/reranks"
-model=BAAI/bge-reranker-large
+export RERANK_MODEL_ID="BAAI/bge-reranker-large"
 revision=refs/pr/4
 volume=$PWD/data
-docker run -d -p 6060:80 -v $volume:/data -e http_proxy=$http_proxy -e https_proxy=$https_proxy --pull always ghcr.io/huggingface/text-embeddings-inference:cpu-1.2 --model-id $model --revision $revision
+docker run -d -p 6060:80 -v $volume:/data -e http_proxy=$http_proxy -e https_proxy=$https_proxy --pull always ghcr.io/huggingface/text-embeddings-inference:cpu-1.2 --model-id $RERANK_MODEL_ID --revision $revision --hf-api-token $HF_TOKEN
 ```
 
 ## 1.3 Verify the TEI Service
diff --git a/comps/reranks/langchain/docker/docker_compose_reranking.yaml b/comps/reranks/langchain/docker/docker_compose_reranking.yaml
index b0929d594..4f6cc09e7 100644
--- a/comps/reranks/langchain/docker/docker_compose_reranking.yaml
+++ b/comps/reranks/langchain/docker/docker_compose_reranking.yaml
@@ -12,7 +12,7 @@ services:
     volumes:
       - "./data:/data"
     shm_size: 1g
-    command: --model-id ${RERANK_MODEL_ID}
+    command: --model-id ${RERANK_MODEL_ID} --hf-api-token ${HF_TOKEN}
   reranking:
     image: opea/reranking-tei:latest
     container_name: reranking-tei-xeon-server
diff --git a/comps/reranks/langchain/reranking_tei_xeon.py b/comps/reranks/langchain/reranking_tei_xeon.py
index 394264743..0bfe88fb4 100644
--- a/comps/reranks/langchain/reranking_tei_xeon.py
+++ b/comps/reranks/langchain/reranking_tei_xeon.py
@@ -3,6 +3,7 @@
 
 import json
 import os
+import re
 import time
 
 import requests
@@ -40,12 +41,16 @@ def reranking(input: SearchedDoc) -> LLMParamsDoc:
     response = requests.post(url, data=json.dumps(data), headers=headers)
     response_data = response.json()
     best_response = max(response_data, key=lambda response: response["score"])
-    template = """Answer the question based only on the following context:
-    {context}
-    Question: {question}
-    """
-    prompt = ChatPromptTemplate.from_template(template)
     doc = input.retrieved_docs[best_response["index"]]
+    if doc.text and len(re.findall("[\u4E00-\u9FFF]", doc.text)) / len(doc.text) >= 0.3:
+        # chinese context
+        template = "仅基于以下背景回答问题:\n{context}\n问题: {question}"
+    else:
+        template = """Answer the question based only on the following context:
+{context}
+Question: {question}
+        """
+    prompt = ChatPromptTemplate.from_template(template)
     final_prompt = prompt.format(context=doc.text, question=input.initial_query)
     statistics_dict["opea_service@reranking_tgi_gaudi"].append_latency(time.time() - start, None)
     return LLMParamsDoc(query=final_prompt.strip())
diff --git a/comps/retrievers/README.md b/comps/retrievers/README.md
index 38f64f33e..43f1d5bc1 100644
--- a/comps/retrievers/README.md
+++ b/comps/retrievers/README.md
@@ -6,114 +6,10 @@ The service primarily utilizes similarity measures in vector space to rapidly re
 
 Overall, this microservice provides robust backend support for applications requiring efficient similarity searches, playing a vital role in scenarios such as recommendation systems, information retrieval, or any other context where precise measurement of document similarity is crucial.
 
-# 🚀1. Start Microservice with Python (Option 1)
+# Retriever Microservice with Redis
 
-To start the retriever microservice, you must first install the required python packages.
+For details, please refer to this [readme](langchain/redis/README.md)
 
-## 1.1 Install Requirements
+# Retriever Microservice with Milvus
 
-```bash
-pip install -r requirements.txt
-```
-
-## 1.2 Start TEI Service
-
-```bash
-export LANGCHAIN_TRACING_V2=true
-export LANGCHAIN_API_KEY=${your_langchain_api_key}
-export LANGCHAIN_PROJECT="opea/retriever"
-model=BAAI/bge-base-en-v1.5
-revision=refs/pr/4
-volume=$PWD/data
-docker run -d -p 6060:80 -v $volume:/data -e http_proxy=$http_proxy -e https_proxy=$https_proxy --pull always ghcr.io/huggingface/text-embeddings-inference:cpu-1.2 --model-id $model --revision $revision
-```
-
-## 1.3 Verify the TEI Service
-
-```bash
-curl 127.0.0.1:6060/rerank \
-    -X POST \
-    -d '{"query":"What is Deep Learning?", "texts": ["Deep Learning is not...", "Deep learning is..."]}' \
-    -H 'Content-Type: application/json'
-```
-
-## 1.4 Setup VectorDB Service
-
-You need to setup your own VectorDB service (Redis in this example), and ingest your knowledge documents into the vector database.
-
-As for Redis, you could start a docker container using the following commands.
-Remember to ingest data into it manually.
-
-```bash
-docker run -d --name="redis-vector-db" -p 6379:6379 -p 8001:8001 redis/redis-stack:7.2.0-v9
-```
-
-## 1.5 Start Retriever Service
-
-```bash
-export TEI_EMBEDDING_ENDPOINT="http://${your_ip}:6060"
-python langchain/retriever_redis.py
-```
-
-# 🚀2. Start Microservice with Docker (Option 2)
-
-## 2.1 Setup Environment Variables
-
-```bash
-export RETRIEVE_MODEL_ID="BAAI/bge-base-en-v1.5"
-export REDIS_URL="redis://${your_ip}:6379"
-export INDEX_NAME=${your_index_name}
-export TEI_EMBEDDING_ENDPOINT="http://${your_ip}:6060"
-export LANGCHAIN_TRACING_V2=true
-export LANGCHAIN_API_KEY=${your_langchain_api_key}
-export LANGCHAIN_PROJECT="opea/retrievers"
-```
-
-## 2.2 Build Docker Image
-
-```bash
-cd ../../
-docker build -t opea/retriever-redis:latest --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -f comps/retrievers/langchain/docker/Dockerfile .
-```
-
-To start a docker container, you have two options:
-
-- A. Run Docker with CLI
-- B. Run Docker with Docker Compose
-
-You can choose one as needed.
-
-## 2.3 Run Docker with CLI (Option A)
-
-```bash
-docker run -d --name="retriever-redis-server" -p 7000:7000 --ipc=host -e http_proxy=$http_proxy -e https_proxy=$https_proxy -e REDIS_URL=$REDIS_URL -e INDEX_NAME=$INDEX_NAME -e TEI_EMBEDDING_ENDPOINT=$TEI_EMBEDDING_ENDPOINT opea/retriever-redis:latest
-```
-
-## 2.4 Run Docker with Docker Compose (Option B)
-
-```bash
-cd langchain/docker
-docker compose -f docker_compose_retriever.yaml up -d
-```
-
-# 🚀3. Consume Retriever Service
-
-## 3.1 Check Service Status
-
-```bash
-curl http://localhost:7000/v1/health_check \
-  -X GET \
-  -H 'Content-Type: application/json'
-```
-
-## 3.2 Consume Embedding Service
-
-To consume the Retriever Microservice, you can generate a mock embedding vector of length 768 with Python.
-
-```bash
-your_embedding=$(python -c "import random; embedding = [random.uniform(-1, 1) for _ in range(768)]; print(embedding)")
-curl http://${your_ip}:7000/v1/retrieval \
-  -X POST \
-  -d "{\"text\":\"What is the revenue of Nike in 2023?\",\"embedding\":${your_embedding}}" \
-  -H 'Content-Type: application/json'
-```
+For details, please refer to this [readme](langchain/milvus/README.md)
diff --git a/comps/retrievers/langchain/README.md b/comps/retrievers/langchain/README.md
deleted file mode 100644
index e69de29bb..000000000
diff --git a/comps/retrievers/langchain/redis/README.md b/comps/retrievers/langchain/redis/README.md
new file mode 100644
index 000000000..38f64f33e
--- /dev/null
+++ b/comps/retrievers/langchain/redis/README.md
@@ -0,0 +1,119 @@
+# Retriever Microservice
+
+This retriever microservice is a highly efficient search service designed for handling and retrieving embedding vectors. It operates by receiving an embedding vector as input and conducting a similarity search against vectors stored in a VectorDB database. Users must specify the VectorDB's URL and the index name, and the service searches within that index to find documents with the highest similarity to the input vector.
+
+The service primarily utilizes similarity measures in vector space to rapidly retrieve contentually similar documents. The vector-based retrieval approach is particularly suited for handling large datasets, offering fast and accurate search results that significantly enhance the efficiency and quality of information retrieval.
+
+Overall, this microservice provides robust backend support for applications requiring efficient similarity searches, playing a vital role in scenarios such as recommendation systems, information retrieval, or any other context where precise measurement of document similarity is crucial.
+
+# 🚀1. Start Microservice with Python (Option 1)
+
+To start the retriever microservice, you must first install the required python packages.
+
+## 1.1 Install Requirements
+
+```bash
+pip install -r requirements.txt
+```
+
+## 1.2 Start TEI Service
+
+```bash
+export LANGCHAIN_TRACING_V2=true
+export LANGCHAIN_API_KEY=${your_langchain_api_key}
+export LANGCHAIN_PROJECT="opea/retriever"
+model=BAAI/bge-base-en-v1.5
+revision=refs/pr/4
+volume=$PWD/data
+docker run -d -p 6060:80 -v $volume:/data -e http_proxy=$http_proxy -e https_proxy=$https_proxy --pull always ghcr.io/huggingface/text-embeddings-inference:cpu-1.2 --model-id $model --revision $revision
+```
+
+## 1.3 Verify the TEI Service
+
+```bash
+curl 127.0.0.1:6060/rerank \
+    -X POST \
+    -d '{"query":"What is Deep Learning?", "texts": ["Deep Learning is not...", "Deep learning is..."]}' \
+    -H 'Content-Type: application/json'
+```
+
+## 1.4 Setup VectorDB Service
+
+You need to setup your own VectorDB service (Redis in this example), and ingest your knowledge documents into the vector database.
+
+As for Redis, you could start a docker container using the following commands.
+Remember to ingest data into it manually.
+
+```bash
+docker run -d --name="redis-vector-db" -p 6379:6379 -p 8001:8001 redis/redis-stack:7.2.0-v9
+```
+
+## 1.5 Start Retriever Service
+
+```bash
+export TEI_EMBEDDING_ENDPOINT="http://${your_ip}:6060"
+python langchain/retriever_redis.py
+```
+
+# 🚀2. Start Microservice with Docker (Option 2)
+
+## 2.1 Setup Environment Variables
+
+```bash
+export RETRIEVE_MODEL_ID="BAAI/bge-base-en-v1.5"
+export REDIS_URL="redis://${your_ip}:6379"
+export INDEX_NAME=${your_index_name}
+export TEI_EMBEDDING_ENDPOINT="http://${your_ip}:6060"
+export LANGCHAIN_TRACING_V2=true
+export LANGCHAIN_API_KEY=${your_langchain_api_key}
+export LANGCHAIN_PROJECT="opea/retrievers"
+```
+
+## 2.2 Build Docker Image
+
+```bash
+cd ../../
+docker build -t opea/retriever-redis:latest --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -f comps/retrievers/langchain/docker/Dockerfile .
+```
+
+To start a docker container, you have two options:
+
+- A. Run Docker with CLI
+- B. Run Docker with Docker Compose
+
+You can choose one as needed.
+
+## 2.3 Run Docker with CLI (Option A)
+
+```bash
+docker run -d --name="retriever-redis-server" -p 7000:7000 --ipc=host -e http_proxy=$http_proxy -e https_proxy=$https_proxy -e REDIS_URL=$REDIS_URL -e INDEX_NAME=$INDEX_NAME -e TEI_EMBEDDING_ENDPOINT=$TEI_EMBEDDING_ENDPOINT opea/retriever-redis:latest
+```
+
+## 2.4 Run Docker with Docker Compose (Option B)
+
+```bash
+cd langchain/docker
+docker compose -f docker_compose_retriever.yaml up -d
+```
+
+# 🚀3. Consume Retriever Service
+
+## 3.1 Check Service Status
+
+```bash
+curl http://localhost:7000/v1/health_check \
+  -X GET \
+  -H 'Content-Type: application/json'
+```
+
+## 3.2 Consume Embedding Service
+
+To consume the Retriever Microservice, you can generate a mock embedding vector of length 768 with Python.
+
+```bash
+your_embedding=$(python -c "import random; embedding = [random.uniform(-1, 1) for _ in range(768)]; print(embedding)")
+curl http://${your_ip}:7000/v1/retrieval \
+  -X POST \
+  -d "{\"text\":\"What is the revenue of Nike in 2023?\",\"embedding\":${your_embedding}}" \
+  -H 'Content-Type: application/json'
+```
diff --git a/comps/retrievers/langchain/__init__.py b/comps/retrievers/langchain/redis/__init__.py
similarity index 100%
rename from comps/retrievers/langchain/__init__.py
rename to comps/retrievers/langchain/redis/__init__.py
diff --git a/comps/retrievers/langchain/data/nke-10k-2023.pdf b/comps/retrievers/langchain/redis/data/nke-10k-2023.pdf
similarity index 100%
rename from comps/retrievers/langchain/data/nke-10k-2023.pdf
rename to comps/retrievers/langchain/redis/data/nke-10k-2023.pdf
diff --git a/comps/retrievers/langchain/docker/Dockerfile b/comps/retrievers/langchain/redis/docker/Dockerfile
similarity index 63%
rename from comps/retrievers/langchain/docker/Dockerfile
rename to comps/retrievers/langchain/redis/docker/Dockerfile
index 0e5dfc9a3..990ca4ebc 100644
--- a/comps/retrievers/langchain/docker/Dockerfile
+++ b/comps/retrievers/langchain/redis/docker/Dockerfile
@@ -15,15 +15,15 @@ RUN useradd -m -s /bin/bash user && \
 
 COPY comps /home/user/comps
 
-RUN chmod +x /home/user/comps/retrievers/langchain/run.sh
+RUN chmod +x /home/user/comps/retrievers/langchain/redis/run.sh
 
 USER user
 
 RUN pip install --no-cache-dir --upgrade pip && \
-    pip install --no-cache-dir -r /home/user/comps/retrievers/requirements.txt
+    pip install --no-cache-dir -r /home/user/comps/retrievers/langchain/redis/requirements.txt
 
 ENV PYTHONPATH=$PYTHONPATH:/home/user
 
-WORKDIR /home/user/comps/retrievers/langchain
+WORKDIR /home/user/comps/retrievers/langchain/redis
 
-ENTRYPOINT ["/home/user/comps/retrievers/langchain/run.sh"]
+ENTRYPOINT ["/home/user/comps/retrievers/langchain/redis/run.sh"]
diff --git a/comps/retrievers/langchain/docker/docker_compose_retriever.yaml b/comps/retrievers/langchain/redis/docker/docker_compose_retriever.yaml
similarity index 100%
rename from comps/retrievers/langchain/docker/docker_compose_retriever.yaml
rename to comps/retrievers/langchain/redis/docker/docker_compose_retriever.yaml
diff --git a/comps/retrievers/langchain/ingest.py b/comps/retrievers/langchain/redis/ingest.py
similarity index 100%
rename from comps/retrievers/langchain/ingest.py
rename to comps/retrievers/langchain/redis/ingest.py
diff --git a/comps/retrievers/langchain/redis_config.py b/comps/retrievers/langchain/redis/redis_config.py
similarity index 100%
rename from comps/retrievers/langchain/redis_config.py
rename to comps/retrievers/langchain/redis/redis_config.py
diff --git a/comps/retrievers/langchain/redis_schema.yml b/comps/retrievers/langchain/redis/redis_schema.yml
similarity index 100%
rename from comps/retrievers/langchain/redis_schema.yml
rename to comps/retrievers/langchain/redis/redis_schema.yml
diff --git a/comps/retrievers/requirements.txt b/comps/retrievers/langchain/redis/requirements.txt
similarity index 100%
rename from comps/retrievers/requirements.txt
rename to comps/retrievers/langchain/redis/requirements.txt
diff --git a/comps/retrievers/langchain/retriever_redis.py b/comps/retrievers/langchain/redis/retriever_redis.py
similarity index 100%
rename from comps/retrievers/langchain/retriever_redis.py
rename to comps/retrievers/langchain/redis/retriever_redis.py
diff --git a/comps/retrievers/langchain/run.sh b/comps/retrievers/langchain/redis/run.sh
similarity index 73%
rename from comps/retrievers/langchain/run.sh
rename to comps/retrievers/langchain/redis/run.sh
index 6f2b1f0bf..f332f7441 100644
--- a/comps/retrievers/langchain/run.sh
+++ b/comps/retrievers/langchain/redis/run.sh
@@ -3,7 +3,7 @@
 # Copyright (C) 2024 Intel Corporation
 # SPDX-License-Identifier: Apache-2.0
 
-cd /home/user/comps/retrievers/langchain
+cd /home/user/comps/retrievers/langchain/redis
 python ingest.py
 
 python retriever_redis.py
diff --git a/tests/test_retrievers_langchain.sh b/tests/test_retrievers_langchain.sh
index 2a9fd5463..451385aa6 100644
--- a/tests/test_retrievers_langchain.sh
+++ b/tests/test_retrievers_langchain.sh
@@ -8,7 +8,7 @@ WORKPATH=$(dirname "$PWD")
 ip_address=$(hostname -I | awk '{print $1}')
 function build_docker_images() {
     cd $WORKPATH
-    docker build --no-cache -t opea/retriever-redis:comps --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -f comps/retrievers/langchain/docker/Dockerfile .
+    docker build --no-cache -t opea/retriever-redis:comps --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -f comps/retrievers/langchain/redis/docker/Dockerfile .
 }
 
 function start_service() {