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diff --git a/update_lib.sh b/update_lib.sh
new file mode 100755
index 000000000..e88fab133
--- /dev/null
+++ b/update_lib.sh
@@ -0,0 +1,75 @@
+#!/bin/bash
+if [ $1 != "update" -a $1 != "rebase" ]; then
+   echo $0 update commit_id [path]
+   echo $0 rebase commit_id [path]
+   exit 1
+fi
+
+cmd=$1
+if [ -z $2 ]; then
+   echo wrong commit_id $2
+   exit 1
+fi
+SHA=$2
+
+LIB_PATH=$3
+if [ -z $3 ]; then
+   LIB_PATH=/mnt/software_output23/esp32_rtos_sdk_core
+fi
+
+result=$(find $LIB_PATH -name *$SHA -print -quit | head -n 1)
+echo find $SHA in $result
+suffix="${result##*/}"
+IFS="^" read -r sbranch tbranch mr_number commit_id <<< "$suffix"
+sbranch="${sbranch//\~/\/}"
+if [ $tbranch == "ng_net80211" ]; then
+    tbranch=master
+fi
+if [ $commit_id != $SHA ];then
+    echo commit id $commit_id does not match $SHA
+    exit 1
+fi
+echo source branch is $sbranch
+echo target branch is $tbranch 
+echo VNC MR number $mr_number
+echo VNC commit SHA is $commit_id
+
+if [ $cmd == "rebase" ]; then
+    cd ..
+    echo change to esp-idf dir $(pwd)
+    git pull
+    git checkout $tbranch
+    git pull origin $tbranch
+    git checkout $sbranch
+    cd lib
+    echo change to wifi-lib dir $(pwd)
+fi
+
+echo checkout $tbranch
+git checkout $tbranch
+echo pull origin $tbranch
+git pull origin $tbranch
+echo delete branch $sbranch
+git branch -D $sbranch
+echo checkout $sbranch on $tbranch
+git checkout -b $sbranch
+echo cp $result to local
+cp $result/* . -rf
+./fix_printf.sh
+commit_message=$(cat $result/MR_TITLE | head -n 1)
+commit_message=$commit_message" VNC MR"$mr_number" ("$commit_id")"
+echo $commit_message
+git commit -am "$commit_message"
+rm MR_TITLE
+
+
+if [ $cmd == "rebase" ]; then
+    cd ..
+    echo change to esp-idf dir $(pwd)
+    git commit -a --amend
+    git rebase $sbranch
+    cd lib
+    echo change to wifi-lib dir $(pwd)
+fi
+
+echo please notice that $sbranch for wifi-lib and esp-idf not pushed to gitlab, please do the push manully.