diff --git a/Makefile b/Makefile
index b094ea9c..f2f15434 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ bump: ## bump hrp version, e.g. make bump version=4.0.0
 .PHONY: build
 build: ## build hrp cli tool
 	@echo "[info] build hrp cli tool"
-	@. scripts/build.sh
+	@. scripts/build.sh $(tags)
 
 .PHONY: install-hooks
 install-hooks: ## install git hooks
diff --git a/examples/uitest/demo_weixin_live.json b/examples/uitest/demo_weixin_live.json
index a789f0ee..9aa990f3 100644
--- a/examples/uitest/demo_weixin_live.json
+++ b/examples/uitest/demo_weixin_live.json
@@ -64,6 +64,7 @@
                     {
                         "method": "swipe_to_tap_text",
                         "params": "轻触进入直播间",
+                        "identifier": "进入直播间",
                         "max_retry_times": 10
                     }
                 ]
@@ -75,7 +76,8 @@
                 "actions": [
                     {
                         "method": "swipe",
-                        "params": "up"
+                        "params": "up",
+                        "identifier": "第一次上划"
                     },
                     {
                         "method": "sleep",
@@ -86,7 +88,8 @@
                     },
                     {
                         "method": "swipe",
-                        "params": "up"
+                        "params": "up",
+                        "identifier": "第二次上划"
                     },
                     {
                         "method": "sleep",
diff --git a/examples/uitest/demo_weixin_live.yaml b/examples/uitest/demo_weixin_live.yaml
index d5f3d795..45393eb2 100644
--- a/examples/uitest/demo_weixin_live.yaml
+++ b/examples/uitest/demo_weixin_live.yaml
@@ -33,17 +33,20 @@ teststeps:
         actions:
             - method: swipe_to_tap_text
               params: 轻触进入直播间
+              identifier: 进入直播间
               max_retry_times: 10
     - name: 向上滑动，等待 10s
       ios:
         actions:
             - method: swipe
               params: up
+              identifier: 第一次上划
             - method: sleep
               params: 10
             - method: screenshot
             - method: swipe
               params: up
+              identifier: 第二次上划
             - method: sleep
               params: 10
             - method: screenshot
diff --git a/hrp/internal/uixt/README.md b/hrp/internal/uixt/README.md
index e9191b29..111281c0 100644
--- a/hrp/internal/uixt/README.md
+++ b/hrp/internal/uixt/README.md
@@ -28,6 +28,10 @@ You can get more installation introduction on [hybridgroup/gocv].
 
 OCR API is a paid service, you need to pre-purchase and configure the account key.
 
+```bash
+$ make build tags=ocr
+```
+
 ## Thanks
 
 This uixt module is initially forked from [electricbubble/gwda-ext-opencv] and made a lot of changes.
diff --git a/hrp/internal/uixt/ext.go b/hrp/internal/uixt/ext.go
index 40907c4f..c140edc2 100644
--- a/hrp/internal/uixt/ext.go
+++ b/hrp/internal/uixt/ext.go
@@ -22,7 +22,6 @@ import (
 type TemplateMatchMode int
 
 type CVArgs struct {
-	scale     float64
 	matchMode TemplateMatchMode
 	threshold float64
 }
@@ -46,6 +45,7 @@ type DriverExt struct {
 	windowSize      gwda.Size
 	frame           *bytes.Buffer
 	doneMjpegStream chan bool
+	scale           float64
 
 	CVArgs
 }
@@ -60,6 +60,10 @@ func extend(driver gwda.WebDriver) (dExt *DriverExt, err error) {
 		return nil, errors.Wrap(err, "failed to get windows size")
 	}
 
+	if dExt.scale, err = dExt.Scale(); err != nil {
+		return nil, err
+	}
+
 	return dExt, nil
 }
 
@@ -213,6 +217,12 @@ func (dExt *DriverExt) FindUIRectInUIKit(search string) (x, y, width, height flo
 	return dExt.FindImageRectInUIKit(search)
 }
 
+func (dExt *DriverExt) MappingToRectInUIKit(rect image.Rectangle) (x, y, width, height float64) {
+	x, y = float64(rect.Min.X)/dExt.scale, float64(rect.Min.Y)/dExt.scale
+	width, height = float64(rect.Dx())/dExt.scale, float64(rect.Dy())/dExt.scale
+	return
+}
+
 func (dExt *DriverExt) PerformTouchActions(touchActions *gwda.TouchActions) error {
 	return dExt.PerformAppiumTouchActions(touchActions)
 }
diff --git a/hrp/internal/uixt/gesture.go b/hrp/internal/uixt/gesture.go
index 2491bb27..5edd8147 100644
--- a/hrp/internal/uixt/gesture.go
+++ b/hrp/internal/uixt/gesture.go
@@ -4,6 +4,7 @@ package uixt
 
 import (
 	"image"
+	"sort"
 
 	"github.com/electricbubble/gwda"
 )
diff --git a/hrp/internal/uixt/ocr_on.go b/hrp/internal/uixt/ocr_on.go
index 2edf0d5a..79d0c271 100644
--- a/hrp/internal/uixt/ocr_on.go
+++ b/hrp/internal/uixt/ocr_on.go
@@ -4,11 +4,15 @@ package uixt
 
 import (
 	"bytes"
+	"encoding/base64"
+	"encoding/json"
 	"fmt"
 	"image"
+	"io/ioutil"
 	"mime/multipart"
 	"net/http"
 	"strings"
+	"time"
 )
 
 var client = &http.Client{
diff --git a/hrp/internal/uixt/opencv_off.go b/hrp/internal/uixt/opencv_off.go
index 7d56d5c5..18045295 100644
--- a/hrp/internal/uixt/opencv_off.go
+++ b/hrp/internal/uixt/opencv_off.go
@@ -22,8 +22,3 @@ func (dExt *DriverExt) FindImageRectInUIKit(imagePath string) (x, y, width, heig
 	log.Fatal().Msg("opencv is not supported")
 	return
 }
-
-func (dExt *DriverExt) MappingToRectInUIKit(rect image.Rectangle) (x, y, width, height float64) {
-	log.Fatal().Msg("opencv is not supported")
-	return
-}
diff --git a/hrp/internal/uixt/opencv_on.go b/hrp/internal/uixt/opencv_on.go
index 6a184695..81afe225 100644
--- a/hrp/internal/uixt/opencv_on.go
+++ b/hrp/internal/uixt/opencv_on.go
@@ -53,10 +53,6 @@ func Extend(driver gwda.WebDriver, options ...CVOption) (dExt *DriverExt, err er
 		option(&dExt.CVArgs)
 	}
 
-	if dExt.scale, err = dExt.Scale(); err != nil {
-		return nil, err
-	}
-
 	if dExt.threshold == 0 {
 		dExt.threshold = 0.95 // default threshold
 	}
@@ -149,9 +145,3 @@ func getBufFromDisk(name string) (*bytes.Buffer, error) {
 	}
 	return bytes.NewBuffer(all), nil
 }
-
-func (dExt *DriverExt) MappingToRectInUIKit(rect image.Rectangle) (x, y, width, height float64) {
-	x, y = float64(rect.Min.X)/dExt.scale, float64(rect.Min.Y)/dExt.scale
-	width, height = float64(rect.Dx())/dExt.scale, float64(rect.Dy())/dExt.scale
-	return
-}
diff --git a/scripts/build.sh b/scripts/build.sh
index 1c6cfd52..67c514ce 100644
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -4,8 +4,10 @@
 
 # Usage:
 # $ make build
+# $ make build tags=ocr
 # or
-# $ bash cli/scripts/build.sh
+# $ bash scripts/build.sh
+# $ bash scripts/build.sh ocr
 
 set -e
 set -x
@@ -14,9 +16,15 @@ set -x
 mkdir -p "output"
 bin_path="output/hrp"
 
-# build
 # optional build tags: opencv ocr
-go build -ldflags '-s -w' -tags ocr -o "$bin_path" hrp/cmd/cli/main.go
+tags=$1
+
+# build
+if [ -z "$tags" ]; then
+    go build -ldflags '-s -w' -o "$bin_path" hrp/cmd/cli/main.go
+else
+    go build -ldflags '-s -w' -tags "$tags" -o "$bin_path" hrp/cmd/cli/main.go
+fi
 
 # check output and version
 ls -lh "$bin_path"
diff --git a/scripts/bump_version.sh b/scripts/bump_version.sh
index 1abba52d..98141421 100644
--- a/scripts/bump_version.sh
+++ b/scripts/bump_version.sh
@@ -3,9 +3,9 @@
 # release will be triggered on github actions, see .github/workflows/release.yml
 
 # Usage:
-# $ make bump version=v0.5.2
+# $ make bump version=v4.3.0
 # or
-# $ bash cli/scripts/bump_version.sh v0.5.2
+# $ bash scripts/bump_version.sh v4.3.0
 
 set -e