diff --git a/README.md b/README.md
index 5f29b0a..e3f70db 100644
--- a/README.md
+++ b/README.md
@@ -80,35 +80,44 @@ $ git clone https://github.com/cc-api/cc-trusted-vmsdk.git
 $ cd cc-trusted-vmsdk
 $ sudo su
 $ source setupenv.sh
-$ python3 -m pip install pytest
 $ python3 -m pytest -v ./src/python/tests/test_sdk.py
 ```
 
 _NOTE: The tests need to run via root user._
 
 
-## 4. Run in Google TDX VM environment with vTPM
+## 4. Run in Google Cloud TDX VM environment with vTPM
 
-Google TDX VM does not support CCEL and RTMR yet, but only support vTPM. So this
-SDK will get event log and integrated measurement register from vTPM by default.
+Google Cloud Platform (GCP) [TDX Preview](https://cloud.google.com/confidential-computing/confidential-vm/docs/create-a-confidential-vm-instance#intel-tdx) does not support CCEL and RTMR yet, but it supports vTPM.
+The SDK will get event log and integrated measurement register from vTPM for GCP TDs.
 
-Please install following pre-requisite for Google TDVM with Ubuntu 22.04 distro:
+Refer to [How to create GCP TD](https://github.com/cc-api/confidential-cluster/blob/main/deployment/single_node_gcp.md) to create a GCP TD.
 
-``
-sudo apt install libtss-dev
-sudo python3 -m pip install tpm2-pytss
-``
+Run the following steps in the GCP TD:
 
-- Dump the PCR (IMR) in Google' TDX instance as follows:
+```
+$ git clone https://github.com/cc-api/cc-trusted-vmsdk.git
+$ cd cc-trusted-vmsdk
+$ sudo su
+$ source setupenv.sh
+
+# Get PCRs of vTPM
+$ python3 ./src/python/cc_imr_cli.py
+
+# Get vTPM event logs in TCG compliant format
+$ python3 ./src/python/cc_event_log_cli.py
+```
+
+- The example output of PCRs (IMR) in a GCP TD as follows:
 ![](/docs/gogle_tdx_tpm_dump_imr.png)
 
-- Dump the TPM event log in Google's TDX instance as follows:
+- The example output of the TPM event log in a GCP TD as follows:
 ![](/docs/gogle_tdx_tpm_dump_eventlog.png)
 
 ## 5. License
 This project is licensed under the Apache 2.0 License.
 
-## 5. Contact
-For any inquiries or support, please contact us at XXX.
+## 6. Contact
+For any inquiries or support, please open an issue or contact us at [Slack](https://cc-api.slack.com/archives/C070P10A0DR).
 
 
diff --git a/setupenv.sh b/setupenv.sh
index bb84759..b892d18 100644
--- a/setupenv.sh
+++ b/setupenv.sh
@@ -2,22 +2,30 @@
 
 CURR_DIR=$(pwd)
 
+# Check if the script is being run as root
+if [ "$EUID" -ne 0 ]; then
+  echo "Please run the script as root"
+  exit 1
+fi
+
 # setup virtualenv and PYTHONPATH
-apt-get update && apt-get install -y python3-virtualenv
+apt-get update
+apt-get install -y python3-virtualenv pkg-config libtss-dev
+
+if [[ -d ${CURR_DIR}/venv ]]; then
+    echo "===========> Remove ${CURR_DIR}/venv and create a new one"
+    rm -rf {CURR_DIR}/venv
+fi
 
-if [[ ! -d ${CURR_DIR}/venv ]]; then
-    python3 -m virtualenv -p python3 ${CURR_DIR}/venv
-    source ${CURR_DIR}/venv/bin/activate
-    python3 -m pip install "cctrusted_base @ git+https://github.com/cc-api/cc-trusted-api.git#subdirectory=common/python"
-    python3 -m pip install -r $CURR_DIR/src/python/requirements.txt
-    if [ ! $? -eq 0 ]; then
-        echo "Failed to install python PIP packages, please check your proxy (https_proxy) or setup PyPi mirror."
-        deactivate
-        rm ${CURR_DIR}/venv -fr
-        return 1
-    fi
-else
-    source ${CURR_DIR}/venv/bin/activate
+python3 -m virtualenv -p python3 ${CURR_DIR}/venv
+source ${CURR_DIR}/venv/bin/activate
+python3 -m pip install "cctrusted_base @ git+https://github.com/cc-api/cc-trusted-api.git#subdirectory=common/python"
+python3 -m pip install -r $CURR_DIR/src/python/requirements.txt
+if [ ! $? -eq 0 ]; then
+    echo "Failed to install python PIP packages, please check your proxy (https_proxy) or setup PyPi mirror."
+    deactivate
+    rm ${CURR_DIR}/venv -fr
+    return 1
 fi
 
 export PYTHONPATH=$PYTHONPATH:$CURR_DIR/src/python