diff --git a/README.md b/README.md
index 6665211..1e21336 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Supported Python versions](https://img.shields.io/badge/python-3.6%20%7C%203.7%20%7C%203.8%20%7C%203.9-blue)](https://www.python.org/downloads/)
 [![PyPI downloads](https://img.shields.io/pypi/dm/dbr)](https://pypistats.org/packages/dbr)
 
-![Dynamsoft](https://dynamsoft.github.io/styleguide/assets/img-icon/logo-dynamsoft-whiteBg-190x47.png "Dynamsoft")  | ![dbr](https://dynamsoft.github.io/styleguide/assets/img-icon/logo-dbr-88x88.png "dbr")
+![Dynamsoft](https://dynamsoft.github.io/styleguide/assets/images/icons/dynamsoft_logos/dynamsoft_logo_original.png "Dynamsoft")  | ![dbr](https://dynamsoft.github.io/styleguide/assets/images/icons/product-logo-SVG/dbr.svg "dbr")
 
 
 ## What You Should Know
@@ -33,7 +33,7 @@
 
 ### Version
 
-- **8.4**
+- **8.6**
 
 ### Supported Platforms
 - **Windows x64**
diff --git a/samples/test_AppendTemplateFile.py b/samples/test_AppendTemplateFile.py
index 39f841c..d73b18a 100644
--- a/samples/test_AppendTemplateFile.py
+++ b/samples/test_AppendTemplateFile.py
@@ -19,14 +19,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_AppendTemplateString.py b/samples/test_AppendTemplateString.py
index 8d6480b..f6e3941 100644
--- a/samples/test_AppendTemplateString.py
+++ b/samples/test_AppendTemplateString.py
@@ -16,14 +16,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeFile.py b/samples/test_DecodeFile.py
index 88312b0..fc6a33b 100644
--- a/samples/test_DecodeFile.py
+++ b/samples/test_DecodeFile.py
@@ -15,14 +15,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeFileInMemory.py b/samples/test_DecodeFileInMemory.py
index 9432b01..579ce10 100644
--- a/samples/test_DecodeFileInMemory.py
+++ b/samples/test_DecodeFileInMemory.py
@@ -14,14 +14,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeImageBufferByOpencv.py b/samples/test_DecodeImageBufferByOpencv.py
index bc2dceb..d5f8eec 100644
--- a/samples/test_DecodeImageBufferByOpencv.py
+++ b/samples/test_DecodeImageBufferByOpencv.py
@@ -18,14 +18,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeImagesInFolder.py b/samples/test_DecodeImagesInFolder.py
index 8318133..344a4cc 100644
--- a/samples/test_DecodeImagesInFolder.py
+++ b/samples/test_DecodeImagesInFolder.py
@@ -18,14 +18,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeIntermediateResults.py b/samples/test_DecodeIntermediateResults.py
index 8313b05..d17066e 100644
--- a/samples/test_DecodeIntermediateResults.py
+++ b/samples/test_DecodeIntermediateResults.py
@@ -15,14 +15,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeLocalVideo.py b/samples/test_DecodeLocalVideo.py
index a8374af..a8e1e64 100644
--- a/samples/test_DecodeLocalVideo.py
+++ b/samples/test_DecodeLocalVideo.py
@@ -43,8 +43,8 @@ def text_results_callback_func(frame_id, t_results, user_data):
             print("Exception : ")
             print(text_result.exception)
             print("-------------")
-## Or you can inherit the abstract class TextResultResultCallBack to implement the abstract method text_results_callback_func.
-# class SubTextResultResultCallBack(TextResultResultCallBack):
+## Or you can inherit the abstract class TextResultCallBack to implement the abstract method text_results_callback_func.
+# class SubTextResultCallBack(TextResultCallBack):
 #     @staticmethod
 #     def text_results_callback_func(frame_id, t_results, user_data):
 #         print(frame_id)
@@ -142,14 +142,14 @@ def read_barcode():
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeLocalVideos.py b/samples/test_DecodeLocalVideos.py
index 242cbc9..35e175b 100644
--- a/samples/test_DecodeLocalVideos.py
+++ b/samples/test_DecodeLocalVideos.py
@@ -46,8 +46,8 @@ def text_results_callback_func(frame_id, t_results, user_data):
             print("Exception : ")
             print(text_result.exception)
             print("-------------")
-## Or you can inherit the abstract class TextResultResultCallBack to implement the abstract method text_results_callback_func.
-# class SubTextResultResultCallBack(TextResultResultCallBack):
+## Or you can inherit the abstract class TextResultCallBack to implement the abstract method text_results_callback_func.
+# class SubTextResultCallBack(TextResultCallBack):
 #     @staticmethod
 #     def text_results_callback_func(frame_id, t_results, user_data):
 #         print(frame_id)
@@ -151,14 +151,14 @@ def read_barcode(video_path):
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeVideoByCamera.py b/samples/test_DecodeVideoByCamera.py
index 4085d8f..9400572 100644
--- a/samples/test_DecodeVideoByCamera.py
+++ b/samples/test_DecodeVideoByCamera.py
@@ -43,8 +43,8 @@ def text_results_callback_func(frame_id, t_results, user_data):
             print("Exception : ")
             print(text_result.exception)
             print("-------------")
-## Or you can inherit the abstract class TextResultResultCallBack to implement the abstract method text_results_callback_func.
-# class SubTextResultResultCallBack(TextResultResultCallBack):
+## Or you can inherit the abstract class TextResultCallBack to implement the abstract method text_results_callback_func.
+# class SubTextResultCallBack(TextResultCallBack):
 #     @staticmethod
 #     def text_results_callback_func(frame_id, t_results, user_data):
 #         print(frame_id)
@@ -146,14 +146,14 @@ def read_barcode():
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_DecodeVideoByPiCamera.py b/samples/test_DecodeVideoByPiCamera.py
index fbd2116..a526a96 100644
--- a/samples/test_DecodeVideoByPiCamera.py
+++ b/samples/test_DecodeVideoByPiCamera.py
@@ -46,8 +46,8 @@ def text_results_callback_func(frame_id, t_results, user_data):
             print("Exception : ")
             print(text_result.exception)
             print("-------------")
-## Or you can inherit the abstract class TextResultResultCallBack to implement the abstract method text_results_callback_func.
-# class SubTextResultResultCallBack(TextResultResultCallBack):
+## Or you can inherit the abstract class TextResultCallBack to implement the abstract method text_results_callback_func.
+# class SubTextResultCallBack(TextResultCallBack):
 #     @staticmethod
 #     def text_results_callback_func(frame_id, t_results, user_data):
 #         print(frame_id)
@@ -159,7 +159,6 @@ def read_barcode():
 
     reader.stop_video_mode()
     cv2.destroyWindow(windowName)
-    camera.close()
 
 
 print("-------------------start------------------------")
@@ -168,14 +167,14 @@ def read_barcode():
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_InitLicenseFromLTS.py b/samples/test_InitLicenseFromDLS.py
similarity index 82%
rename from samples/test_InitLicenseFromLTS.py
rename to samples/test_InitLicenseFromDLS.py
index 03358e1..95f55ba 100644
--- a/samples/test_InitLicenseFromLTS.py
+++ b/samples/test_InitLicenseFromDLS.py
@@ -4,7 +4,7 @@
 
 reader = BarcodeReader()
 
-connection_paras = BarcodeReader.init_lts_connection_parameters()
+connection_paras = BarcodeReader.init_dls_connection_parameters()
 # If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 connection_paras.main_server_url = "Input your own server url"
 connection_paras.handshake_code = "Input your own handshake"
@@ -12,7 +12,7 @@
 connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 
 try:
-    error = BarcodeReader.init_license_from_lts(connection_paras)
+    error = BarcodeReader.init_license_from_dls(connection_paras)
     if error[0] != EnumErrorCode.DBR_OK:
         print(error[1])
 except BarcodeReaderError as bre:
diff --git a/samples/test_InitRuntimeSettingsByFile.py b/samples/test_InitRuntimeSettingsByFile.py
index 414f209..1f2de34 100644
--- a/samples/test_InitRuntimeSettingsByFile.py
+++ b/samples/test_InitRuntimeSettingsByFile.py
@@ -18,14 +18,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_InitRuntimeSettingsByString.py b/samples/test_InitRuntimeSettingsByString.py
index f602689..970c244 100644
--- a/samples/test_InitRuntimeSettingsByString.py
+++ b/samples/test_InitRuntimeSettingsByString.py
@@ -15,14 +15,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre:
diff --git a/samples/test_UpdateRuntimeSettings.py b/samples/test_UpdateRuntimeSettings.py
index e360acc..2b136ae 100644
--- a/samples/test_UpdateRuntimeSettings.py
+++ b/samples/test_UpdateRuntimeSettings.py
@@ -12,14 +12,14 @@
 reader.init_license(license_key)
 
 ## The code snippet below shows how to use the full license in DBR 8.x:
-# connection_paras = BarcodeReader.init_lts_connection_parameters()
+# connection_paras = BarcodeReader.init_dls_connection_parameters()
 ## If DBR service is already built on your server, you can fill in the address of your server, or leave this property's default value.
 # connection_paras.main_server_url = "Input your own server url"
 # connection_paras.handshake_code = "Input your own handshake"
 # connection_paras.deployment_type = EnumDMDeploymentType.DM_DT_DESKTOP
 # connection_paras.uuid_generation_method = EnumDMUUIDGenerationMethod.DM_UUIDGM_RANDOM
 # try:
-#     error = BarcodeReader.init_license_from_lts(connection_paras)
+#     error = BarcodeReader.init_license_from_dls(connection_paras)
 #     if error[0] != EnumErrorCode.DBR_OK:
 #         print(error[1])
 # except BarcodeReaderError as bre: