diff --git a/custom_components/china_southern_power_grid_stat/config_flow.py b/custom_components/china_southern_power_grid_stat/config_flow.py
index 3550257..d0a15b0 100644
--- a/custom_components/china_southern_power_grid_stat/config_flow.py
+++ b/custom_components/china_southern_power_grid_stat/config_flow.py
@@ -21,14 +21,46 @@
 from homeassistant.exceptions import ConfigEntryAuthFailed
 from requests import RequestException
 
-from .const import (ABORT_ALL_ADDED, ABORT_NO_ACCOUNT, CONF_ACCOUNT_NUMBER, CONF_ACTION, CONF_AUTH_TOKEN,
-                    CONF_ELE_ACCOUNTS, CONF_GENERAL_ERROR, CONF_LOGIN_TYPE, CONF_REFRESH_QR_CODE, CONF_SETTINGS,
-                    CONF_SMS_CODE, CONF_UPDATED_AT, CONF_UPDATE_INTERVAL, DEFAULT_UPDATE_INTERVAL, DOMAIN,
-                    ERROR_CANNOT_CONNECT, ERROR_INVALID_AUTH, ERROR_QR_NOT_SCANNED, ERROR_UNKNOWN,
-                    LOGIN_TYPE_TO_QR_APP_NAME, STEP_ADD_ACCOUNT, STEP_ALI_QR_LOGIN, STEP_CSG_QR_LOGIN, STEP_INIT,
-                    STEP_QR_LOGIN, STEP_SETTINGS, STEP_SMS_LOGIN, STEP_SMS_PWD_LOGIN, STEP_USER, STEP_VALIDATE_SMS_CODE,
-                    STEP_WX_QR_LOGIN)
-from .csg_client import (CSGClient, CSGElectricityAccount, InvalidCredentials, LOGIN_TYPE_TO_QR_CODE_TYPE, LoginType)
+from .const import (
+    ABORT_ALL_ADDED,
+    ABORT_NO_ACCOUNT,
+    CONF_ACCOUNT_NUMBER,
+    CONF_ACTION,
+    CONF_AUTH_TOKEN,
+    CONF_ELE_ACCOUNTS,
+    CONF_GENERAL_ERROR,
+    CONF_LOGIN_TYPE,
+    CONF_REFRESH_QR_CODE,
+    CONF_SETTINGS,
+    CONF_SMS_CODE,
+    CONF_UPDATE_INTERVAL,
+    CONF_UPDATED_AT,
+    DEFAULT_UPDATE_INTERVAL,
+    DOMAIN,
+    ERROR_CANNOT_CONNECT,
+    ERROR_INVALID_AUTH,
+    ERROR_QR_NOT_SCANNED,
+    ERROR_UNKNOWN,
+    LOGIN_TYPE_TO_QR_APP_NAME,
+    STEP_ADD_ACCOUNT,
+    STEP_ALI_QR_LOGIN,
+    STEP_CSG_QR_LOGIN,
+    STEP_INIT,
+    STEP_QR_LOGIN,
+    STEP_SETTINGS,
+    STEP_SMS_LOGIN,
+    STEP_SMS_PWD_LOGIN,
+    STEP_USER,
+    STEP_VALIDATE_SMS_CODE,
+    STEP_WX_QR_LOGIN,
+)
+from .csg_client import (
+    LOGIN_TYPE_TO_QR_CODE_TYPE,
+    CSGClient,
+    CSGElectricityAccount,
+    InvalidCredentials,
+    LoginType,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/custom_components/china_southern_power_grid_stat/csg_client_demo.py b/custom_components/china_southern_power_grid_stat/csg_client_demo.py
index c751225..1aa548d 100644
--- a/custom_components/china_southern_power_grid_stat/csg_client_demo.py
+++ b/custom_components/china_southern_power_grid_stat/csg_client_demo.py
@@ -5,7 +5,12 @@
 import sys
 import time
 
-from csg_client import (CSGClient, CSGElectricityAccount, LOGIN_TYPE_TO_QR_CODE_TYPE, LoginType)
+from csg_client import (
+    LOGIN_TYPE_TO_QR_CODE_TYPE,
+    CSGClient,
+    CSGElectricityAccount,
+    LoginType,
+)
 
 QR_SCAN_TIMEOUT = 300
 
diff --git a/custom_components/china_southern_power_grid_stat/sensor.py b/custom_components/china_southern_power_grid_stat/sensor.py
index 2ef615e..f314b97 100644
--- a/custom_components/china_southern_power_grid_stat/sensor.py
+++ b/custom_components/china_southern_power_grid_stat/sensor.py
@@ -62,9 +62,20 @@
     SUFFIX_THIS_YEAR_KWH,
     SUFFIX_YESTERDAY_KWH,
 )
-from .csg_client import (CSGAPIError, CSGClient, CSGElectricityAccount, JSON_KEY_METERING_POINT_NUMBER, NotLoggedIn,
-                         WF_ATTR_CHARGE, WF_ATTR_DATE, WF_ATTR_KWH, WF_ATTR_LADDER, WF_ATTR_LADDER_REMAINING_KWH,
-                         WF_ATTR_LADDER_START_DATE, WF_ATTR_LADDER_TARIFF)
+from .csg_client import (
+    JSON_KEY_METERING_POINT_NUMBER,
+    WF_ATTR_CHARGE,
+    WF_ATTR_DATE,
+    WF_ATTR_KWH,
+    WF_ATTR_LADDER,
+    WF_ATTR_LADDER_REMAINING_KWH,
+    WF_ATTR_LADDER_START_DATE,
+    WF_ATTR_LADDER_TARIFF,
+    CSGAPIError,
+    CSGClient,
+    CSGElectricityAccount,
+    NotLoggedIn,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/custom_components/china_southern_power_grid_stat/strings.json b/custom_components/china_southern_power_grid_stat/strings.json
index 7206c67..4587df9 100644
--- a/custom_components/china_southern_power_grid_stat/strings.json
+++ b/custom_components/china_southern_power_grid_stat/strings.json
@@ -65,9 +65,6 @@
       "add_account": {
         "title": "选择缴费号"
       },
-      "remove_account": {
-        "title": "移除缴费号"
-      },
       "settings": {
         "title": "参数设置",
         "data": {
diff --git a/custom_components/china_southern_power_grid_stat/translations/en.json b/custom_components/china_southern_power_grid_stat/translations/en.json
index 8d024e3..67057c9 100644
--- a/custom_components/china_southern_power_grid_stat/translations/en.json
+++ b/custom_components/china_southern_power_grid_stat/translations/en.json
@@ -69,9 +69,6 @@
             "init": {
                 "title": "\u9009\u62e9\u64cd\u4f5c"
             },
-            "remove_account": {
-                "title": "\u79fb\u9664\u7f34\u8d39\u53f7"
-            },
             "settings": {
                 "data": {
                     "update_interval": "\u66f4\u65b0\u95f4\u9694\uff08\u79d2\uff09"
diff --git a/custom_components/china_southern_power_grid_stat/translations/zh-Hans.json b/custom_components/china_southern_power_grid_stat/translations/zh-Hans.json
index 8d024e3..67057c9 100644
--- a/custom_components/china_southern_power_grid_stat/translations/zh-Hans.json
+++ b/custom_components/china_southern_power_grid_stat/translations/zh-Hans.json
@@ -69,9 +69,6 @@
             "init": {
                 "title": "\u9009\u62e9\u64cd\u4f5c"
             },
-            "remove_account": {
-                "title": "\u79fb\u9664\u7f34\u8d39\u53f7"
-            },
             "settings": {
                 "data": {
                     "update_interval": "\u66f4\u65b0\u95f4\u9694\uff08\u79d2\uff09"