diff --git a/hyperledger_fabric/test/channel-update-config.sh b/hyperledger_fabric/test/channel-update-config.sh
new file mode 100644
index 00000000..1a22a261
--- /dev/null
+++ b/hyperledger_fabric/test/channel-update-config.sh
@@ -0,0 +1,335 @@
+#!/usr/bin/env sh
+
+# Fetch a config block and update it. The new channel cfg section will be generated by $CAL_NEW_CFG_PY
+
+# Usage: ./script channelListFile ordererURL mspId mspPath
+# For testing a single channel, can use as: ./script channel ordererURL mspId mspPath
+
+SYS_CHANNEL_NAME="testchainid"           # default system channel name
+CAL_NEW_CFG_PY="calc-new-channel-cfg.py" # script to calculate the new channel cfg section
+
+# use configtxlator to decode pb to json
+# Usage: configtxlatorDecode msgType input output
+configtxlatorDecode() {
+  msgType=$1
+  input=$2
+  output=$3
+
+  if [ ! -f "$input" ]; then
+    echo "configDecode: input file not found"
+    exit 1
+  fi
+
+  if ! command -v configtxlator >/dev/null 2>&1; then
+    echo "configtxlator could not be found, please install it first"
+    exit 1
+  fi
+
+  echo "Decode $input --> $output using type $msgType"
+  configtxlator proto_decode \
+    --type="${msgType}" \
+    --input="${input}" \
+    --output="${output}"
+
+  [ $? -ne 0 ] && echo "Failed to decode config section from pb"
+}
+
+# use configtxlator to encode json to pb
+# Usage: configtxlatorEncode msgType input output
+configtxlatorEncode() {
+  msgType=$1
+  input=$2
+  output=$3
+
+  if [ ! -f "$input" ]; then
+    echo "configEncode: input file not found"
+    exit 1
+  fi
+
+  if ! command -v configtxlator >/dev/null 2>&1; then
+    echo "configtxlator could not be found, please install it first"
+    exit 1
+  fi
+
+  echo "Config Encode $input --> $output using type $msgType"
+  configtxlator proto_encode \
+    --type="${msgType}" \
+    --input="${input}" \
+    --output="${output}"
+
+  [ $? -eq 0 ] || echo "Failed to encode config section to pb"
+}
+
+# compute diff between two pb
+# Usage: configtxlatorCompare channel origin_pb updated_pb output_pb
+configtxlatorCompare() {
+  channel=$1
+  origin=$2
+  updated=$3
+  output=$4
+
+  echo "Config Compare $origin vs $updated > ${output} in channel $channel"
+  if [ ! -f "$origin" ] || [ ! -f "$updated" ]; then
+    echo "input file not found"
+    exit 1
+  fi
+
+  configtxlator compute_update \
+    --original="${origin}" \
+    --updated="${updated}" \
+    --channel_id="${channel}" \
+    --output="${output}"
+
+  [ $? -eq 0 ] || echo "Failed to compute config update"
+}
+
+# fetchConfigBlock fetch the latest config block, and parse the config section into channelCfgJson
+# Usage: fetchConfigBlock channel mspId mspPath ordererURL ordererTLSRoot channelCfgJson
+fetchConfigBlock() {
+  if [ $# -lt 6 ]; then
+    echo "Not enough argument supplied"
+    echo "$(basename $0) channel channel_config_block_cfg.json update_tx.pb"
+    exit 1
+  fi
+
+  channel=$1
+  mspId=$2
+  mspPath=$3
+  ordererURL=$4
+  ordererTLSRoot=$5
+  channelCfgJson=$6
+  config_block=${channel}_config.block
+  PAYLOAD_CFG_PATH=".data.data[0].payload.data.config"
+
+  export CORE_PEER_LOCALMSPID=${mspId}
+  export CORE_PEER_MSPCONFIGPATH=${mspPath}
+  export CORE_PEER_TLS_ROOTCERT_FILE=${ordererTLSRoot}
+
+  peer channel fetch config "${config_block}" \
+    -c "${channel}" \
+    -o "${ordererURL}" \
+    --tls \
+    --cafile "${ordererTLSRoot}"
+
+  echo "[${channel}] Decode config block into ${channel}_config.block.json"
+  configtxlatorDecode "common.Block" "${channel}_config.block" "${channel}_config_block.json"
+
+  echo "[${channel}] Export the config section ${PAYLOAD_CFG_PATH} from ${channel}_config_block.json into ${channelCfgJson}"
+  jq "${PAYLOAD_CFG_PATH}" "${channel}_config_block.json" >"${channelCfgJson}"
+  jq . "${channelCfgJson}" >/dev/null
+  [ $? -ne 0 ] && {
+    echo "${channel}_config_block_cfg.json is invalid"
+    exit 1
+  }
+
+  return 0
+}
+
+# Generate a new config section json from old config section, including the channel cfg updates
+# Usage genNewCfgSection channel old_config_json new_config_json
+calcNewCfgSection() {
+  if [ $# -lt 3 ]; then
+    echo "Not enough argument supplied"
+    echo "$(basename $0) channel channel_config_block_cfg.json channel_config_block_cfg_new.json"
+    exit 1
+  fi
+  channel=$1
+  oldCfgJson=$2 # ${channel}_config_block_cfg.json
+  newCfgJson=$3 # ${channel}_config_block_cfg_new.json
+
+  # TODO: here we calculate the new channel cfg json using python
+  if [ "${channel}" = "${SYS_CHANNEL_NAME}" ]; then
+    python3 $CAL_NEW_CFG_PY --sys --input $oldCfgJson --output $newCfgJson
+  else
+    python3 $CAL_NEW_CFG_PY --input $oldCfgJson --output $newCfgJson
+  fi
+
+  jq . "${newCfgJson}" >/dev/null
+  [ $? -ne 0 ] && {
+    echo "${newCfgJson} is invalid"
+    exit 1
+  }
+}
+
+# Generate a channel update transaction based on existing config block
+# Usage genUpdateTx channel old_config_json update_tx_pb
+genUpdateTx() {
+  if [ $# -lt 3 ]; then
+    echo "Not enough argument supplied"
+    echo "$(basename $0) channel channel_config_block_cfg.json update_tx.pb"
+    exit 1
+  fi
+  channel=$1
+  oldCfgJson=$2 # ${channel}_config_block_cfg.json
+  oldCfgPb=${channel}_config_block_cfg.pb
+  newCfgJson=${channel}_config_block_cfg_new.json
+  newCfgPb=${channel}_config_block_cfg_new.pb
+  deltaCfgPb=${channel}_config_block_cfg_delta.pb
+  deltaCfgJson=${channel}_config_block_cfg_delta.json
+  deltaCfgEnvJson=${channel}_config_block_cfg_delta_env.json
+  deltaCfgEnvPb=${3:-${channel}_config_block_cfg_delta_env.pb}
+
+  echo "[$channel] Start generating a channel update tx..."
+
+  echo "[$channel] Modify channel cfg section: ${oldCfgJson}-->${newCfgJson}"
+  calcNewCfgSection "${channel}" "${oldCfgJson}" "${newCfgJson}"
+
+  echo "[$channel] Convert channel cfg section json into pb files ..."
+  configtxlatorEncode "common.Config" "${oldCfgJson}" "${oldCfgPb}"
+  configtxlatorEncode "common.Config" "${newCfgJson}" "${newCfgPb}"
+
+  echo "[$channel] Calculate the config delta between pb files: ${oldCfgPb}+${newCfgPb}-->${deltaCfgPb}"
+  configtxlatorCompare "${channel}" "${oldCfgPb}" "${newCfgPb}" "${deltaCfgPb}"
+
+  echo "[$channel] Decode the config delta pb into json: ${deltaCfgPb}-->${deltaCfgJson}"
+  configtxlatorDecode "common.ConfigUpdate" "${deltaCfgPb}" "${deltaCfgJson}"
+  jq . "${deltaCfgJson}" >/dev/null
+  [ $? -ne 0 ] && {
+    echo "${deltaCfgJson} is invalid"
+    exit 1
+  }
+
+  echo "[$channel] Wrap the delta config section as an envelope: ${deltaCfgJson}-->${deltaCfgEnvJson}"
+  echo '{"payload":{"header":{"channel_header":{"channel_id":"'"$channel"'", "type":2}},"data":{"config_update":'$(cat ${deltaCfgJson})'}}}' | jq . >"${deltaCfgEnvJson}"
+
+  echo "[$channel] Encode the delta config update envelope into pb: ${deltaCfgEnvJson}-->${deltaCfgPb}"
+  configtxlatorEncode "common.Envelope" "${deltaCfgEnvJson}" "${deltaCfgEnvPb}"
+
+  echo "[$channel] Channel update tx is generated as ${deltaCfgPb}, now ready to sign and send the channel update tx"
+
+  return 0
+}
+
+# Sign a channel update transaction
+# Usage: signUpdateTx mspId mspPath tx
+signUpdateTx() {
+  if [ $# -lt 3 ]; then
+    echo "Not enough argument supplied"
+    echo "$(basename $0) mspId mspPath tx"
+  fi
+
+  mspId=$1
+  mspPath=$2
+  tx=$3
+
+  echo "Sign channel config tx $tx by $mspId"
+  [ -f "${tx}" ] || {
+    echo "${tx} not exist"
+    exit 1
+  }
+
+  export CORE_PEER_LOCALMSPID=${mspId}
+  export CORE_PEER_MSPCONFIGPATH=${mspPath}
+
+  peer channel signconfigtx -f "${tx}" >log.txt 2>&1
+  rc=$?
+  [ $rc -ne 0 ] && cat log.txt
+  if [ $rc -ne 0 ]; then
+    echo "Sign channel config tx $tx by $mspId failed"
+  else
+    echo "Sign channel config tx $tx by $mspId is successful"
+  fi
+
+  return 0
+}
+
+# Send a channel update transaction
+# Usage: sendUpdateTx "${channel}" "${mspId}" "${mspPath}" "${ordererURL}" "${ordererTLSRoot}" "${updateTx}"
+sendUpdateTx() {
+  if [ $# -lt 6 ]; then
+    echo "Not enough argument supplied"
+    echo "$(basename $0) channel mspId mspPath ordererURL ordererTLSRoot updateTx"
+    exit 1
+  fi
+
+  channel=$1
+  mspId=$2
+  mspPath=$3
+  ordererURL=$4
+  ordererTLSRoot=$5
+  tx=$6
+
+  export CORE_PEER_LOCALMSPID=${mspId}
+  export CORE_PEER_MSPCONFIGPATH=${mspPath}
+  export CORE_PEER_TLS_ROOTCERT_FILE=${ordererTLSRoot}
+
+  echo "[${channel}] Send the channel update tx by $mspId $mspPath to $ordererURL"
+  peer channel update \
+    -c "${channel}" \
+    -o "${ordererURL}" \
+    -f "${tx}" \
+    --tls \
+    --cafile "${ordererTLSRoot}" \
+    >log.txt 2>&1
+
+  [ $? -ne 0 ] && { echo "[${channel}] Failed to send channel update tx to OSN" && cat log.txt; }
+
+  return 0
+}
+
+# Entrance function, will call other functions
+# Update a single channel's config, need to be founder's admin
+# Usage: updateChannel channel, ordererURL, mspId, mspPath
+UpdateChannel() {
+  if [ $# -lt 3 ]; then
+    echo "Not enough argument supplied"
+    echo "$(basename $0) channel ordererURL mspId mspPath=${PWD}/msp-mspId"
+    exit 1
+  fi
+  channel=$1
+  ordererURL=$2
+  mspId=$3
+  mspPath=${4:-${PWD}/msp-${mspId}} # Suppose the msp path named as msp-${msp_id}
+  ordererTLSRoot=${mspPath}/tlscacerts/tlsca.cert
+  channelCfgJson=${channel}_config_block_cfg.json
+  updateTx="${channel}_config_block_cfg_delta_env.pb"
+
+  export FABRIC_LOGGING_SPEC="debug"
+  #export CORE_PEER_LOCALMSPID=${mspId}
+  #export CORE_PEER_MSPCONFIGPATH=${mspPath}
+  #export CORE_PEER_TLS_ROOTCERT_FILE=${ordererTLSRoot}
+  #export CORE_PEER_TLS_ENABLED=true # Let client use TLS connection when connecting to peer
+
+  echo "[${channel}] Fetch config block from ${ordererURL} and decode the cfg section into ${channelCfgJson}"
+  fetchConfigBlock "${channel}" "${mspId}" "${mspPath}" "${ordererURL}" "${ordererTLSRoot}" "$channelCfgJson"
+  [ $? -ne 0 ] && { echo "[${channel}] Failed to fetch latest config from OSN" && exit 1; }
+
+  echo "[${channel}] Generate the channel update tx"
+  genUpdateTx "${channel}" "${channelCfgJson}" "${updateTx}"
+  [ $? -ne 0 ] && { echo "[${channel}] Failed to generate new channel config" && exit 1; }
+
+  # TODO: do we support multiple msps?
+  echo "[${channel}] Sign the channel update tx ${updateTx} by $mspId $mspPath"
+  signUpdateTx "${mspId}" "${mspPath}" "${updateTx}"
+  [ $? -ne 0 ] && { echo "[${channel}] Failed to sign the channel config update tx" && exit 1; }
+
+  echo "[${channel}] Send the channel update tx ${updateTx} by $mspId $mspPath to ${ordererTLSRoot}"
+  sendUpdateTx "${channel}" "${mspId}" "${mspPath}" "${ordererURL}" "${ordererTLSRoot}" "${updateTx}"
+  [ $? -ne 0 ] && { echo "[${channel}] Failed to send the channel update tx to ${ordererURL}" && exit 1; }
+}
+
+if [ $# -lt 4 ]; then
+  echo "Not enough argument supplied"
+  echo "$(basename $0) channelListFile ordererURL mspId mspPath"
+  exit 1
+fi
+channelListFile=$1
+ordererURL=$2
+mspId=$3
+mspPath=$4 # the msp path
+
+if [ -f ${channelListFile} ]; then
+  i=0
+  while read channel; do
+    ((i++))
+    echo "Will process channel[$i]=$channel"
+    if [[ $channel =~ ^#.*  ]]; then
+      echo "channel[$i]=$channel is ignored"
+    else
+      UpdateChannel "$channel" "${@:2}"
+    fi
+  done <${channelListFile}
+else
+  # for test purpose only
+  UpdateChannel "$@" # channel, ordererURL, mspid, mspPath
+fi
diff --git a/hyperledger_fabric/test/fetch-config-block.sh b/hyperledger_fabric/test/fetch-config-block.sh
index 459a1d26..c4450cc7 100644
--- a/hyperledger_fabric/test/fetch-config-block.sh
+++ b/hyperledger_fabric/test/fetch-config-block.sh
@@ -61,12 +61,12 @@ fi
 main() {
   if [ $# -lt 3 ]; then
     echo "Not enough argument supplied"
-    echo "$(basename $0) mspId channel ordererURL mspPath=${PWD}/msp-mspId"
+    echo "$(basename $0) channel ordererURL mspId mspPath=${PWD}/msp-mspId"
     exit 1
   fi
-  local mspId=$1
-  local channel=$2
-  local ordererURL=$3
+  local channel=$1
+  local ordererURL=$2
+  local mspId=$3
   local mspPath=${4:-${PWD}/msp-${mspId}} # Suppose the local msp path named as msp-${msp_id}
 
   export FABRIC_LOGGING_SPEC="debug"
diff --git a/hyperledger_fabric/v2.1.0/scripts/json_flatter.py b/hyperledger_fabric/v2.1.0/scripts/json_flatter.py
index c931d7a6..4916abf4 100644
--- a/hyperledger_fabric/v2.1.0/scripts/json_flatter.py
+++ b/hyperledger_fabric/v2.1.0/scripts/json_flatter.py
@@ -81,7 +81,7 @@ def process(directory):
 			f_read.close()
 			f_write.close()
 		else:
-			print("Ignore non-json file {}".format(f))
+			print("Ignore non .block.json file {}".format(f))
 
 
 # Usage python json_flatter.py [path_containing_json_files]
diff --git a/hyperledger_fabric/v2.2.4/scripts/func.sh b/hyperledger_fabric/v2.2.4/scripts/func.sh
index 1781c83c..59513a51 100644
--- a/hyperledger_fabric/v2.2.4/scripts/func.sh
+++ b/hyperledger_fabric/v2.2.4/scripts/func.sh
@@ -1044,7 +1044,7 @@ configtxlatorEncode() {
 }
 
 # configtxlator decode pb to json
-# Usage: configtxlatorEncode msgType input output
+# Usage: configtxlatorDecode msgType input output
 configtxlatorDecode() {
   local msgType=$1
   local input=$2
diff --git a/hyperledger_fabric/v2.3.3/scripts/json_flatter.py b/hyperledger_fabric/v2.3.3/scripts/json_flatter.py
index 890c5181..4916abf4 100644
--- a/hyperledger_fabric/v2.3.3/scripts/json_flatter.py
+++ b/hyperledger_fabric/v2.3.3/scripts/json_flatter.py
@@ -20,11 +20,11 @@ def decode_if_b64(raw):
 	except binascii.Error:
 		success = False
 
-	# if success:  # result_bytes = b'xxxx\xx'
-	# print('===================Start==================================')
-	# print(raw)
-	# print(result)
-	# print('=====================End===================================')
+	#if success:  # result_bytes = b'xxxx\xx'
+		#print('===================Start==================================')
+		#print(raw)
+		#print(result)
+		#print('=====================End===================================')
 	return success, result
 
 
@@ -44,7 +44,7 @@ def check_tree(tree, prefix, f_write):
 			else:  # leaf
 				result = v
 				if 'cert' in k or 'id_bytes' in k or 'value' in k and 'hash' not in k:
-					# print(prefix_path)
+					#print(prefix_path)
 					success, result = decode_if_b64(v)
 					if success:
 						result = "b64({})".format(result)
@@ -76,13 +76,12 @@ def process(directory):
 		if f.endswith(".block.json"):
 			file_name = os.path.join(json_dir, f)
 			f_read = open(file=file_name, mode="r", encoding='utf-8')
-			f_write = open(file=file_name + "-flat.json", mode="w",
-			               encoding='utf-8')
+			f_write = open(file=file_name+"-flat.json", mode="w", encoding='utf-8')
 			check_tree(json.load(f_read), "", f_write)
 			f_read.close()
 			f_write.close()
 		else:
-			print("Ignore non-json file {}".format(f))
+			print("Ignore non .block.json file {}".format(f))
 
 
 # Usage python json_flatter.py [path_containing_json_files]