diff --git a/cinrad/io/_radar_struct/standard_data.py b/cinrad/io/_radar_struct/standard_data.py
index 4d2794e..2b8a56d 100644
--- a/cinrad/io/_radar_struct/standard_data.py
+++ b/cinrad/io/_radar_struct/standard_data.py
@@ -365,13 +365,13 @@
 l3_vwp_header_dtype = np.dtype(l3_vwp_header)
 
 l3_vwp_table = [
-    ("start_time","i4"),
-    ("height","i4"),
-    ("fitvalid","i4"),
-    ("wind_direction","f4"),
-    ("wind_speed","f4"),
-    ("rms_std","f4"),
-    ("res","8c"),
+    ("start_time", "i4"),
+    ("height", "i4"),
+    ("fitvalid", "i4"),
+    ("wind_direction", "f4"),
+    ("wind_speed", "f4"),
+    ("rms_std", "f4"),
+    ("res", "8c"),
 ]
 
 l3_vwp_table_dtype = np.dtype(l3_vwp_table)
diff --git a/cinrad/io/level2.py b/cinrad/io/level2.py
index a08247e..4a4b07d 100644
--- a/cinrad/io/level2.py
+++ b/cinrad/io/level2.py
@@ -27,10 +27,14 @@
 
 def epoch_seconds_to_utc(epoch_seconds: float) -> datetime.datetime:
     r"""Convert epoch seconds to UTC datetime"""
-    return datetime.datetime.utcfromtimestamp(epoch_seconds).replace(tzinfo=datetime.timezone.utc)
+    return datetime.datetime.utcfromtimestamp(epoch_seconds).replace(
+        tzinfo=datetime.timezone.utc
+    )
 
 
-def localdatetime_to_utc(ldt: datetime.datetime, tz: datetime.timezone = utc8_tz) -> datetime.datetime:
+def localdatetime_to_utc(
+    ldt: datetime.datetime, tz: datetime.timezone = utc8_tz
+) -> datetime.datetime:
     r"""Convert local datetime to UTC datetime"""
     if ldt.tzinfo is None:
         ldt = ldt.replace(tzinfo=tz)  # suppose the default timezone is UTC+8
@@ -168,7 +172,9 @@ def _SAB_reader(self, f: Any, dtype: str = "SAB"):
         data = np.frombuffer(f.read(), dtype=radar_dtype)
         deltday = datetime.timedelta(days=int(data["day"][0]))
         deltsec = datetime.timedelta(milliseconds=int(data["time"][0]))
-        _ONE_DAY = datetime.timedelta(days=1)  # MARK: start from 1969-12-31, we don't know why
+        _ONE_DAY = datetime.timedelta(
+            days=1
+        )  # MARK: start from 1969-12-31, we don't know why
         epoch_seconds = (deltday + deltsec - _ONE_DAY).total_seconds()
         self.scantime = epoch_seconds_to_utc(epoch_seconds)
         self.Rreso = data["gate_length_r"][0] / 1000
@@ -900,9 +906,7 @@ def __init__(self, file):
         self.stationlon = data["header"]["longitude"][0] * 360 / 65535
         self.stationlat = data["header"]["latitude"][0] * 360 / 65535
         self.radarheight = data["header"]["height"][0] * 1000 / 65535
-        self.scantime = epoch_seconds_to_utc(
-            data["data"]["radial_time"][0]
-        )
+        self.scantime = epoch_seconds_to_utc(data["data"]["radial_time"][0])
         self.reso = np.round(data["data"]["gate_length"][0] * 1000 / 65535) / 1000
         self.first_gate_dist = (
             np.round(data["data"]["first_gate_dist"][0] * 1000 / 65535) / 1000
diff --git a/cinrad/visualize/utils.py b/cinrad/visualize/utils.py
index 748d64f..13b801d 100644
--- a/cinrad/visualize/utils.py
+++ b/cinrad/visualize/utils.py
@@ -171,11 +171,13 @@ def __init__(self, filename: str, encoding: str = "gbk"):
             pass
         self._fields = self._reader.fields
 
+
 from cartopy import __version__
 
 if __version__ >= "0.23.0":
     ShpReader = shapereader.BasicReader
 
+
 def setup_plot(dpi: Number_T, figsize: tuple = FIG_SIZE, style: str = "black") -> Any:
     if style == "transparent":
         figsize = (10, 10)
@@ -261,7 +263,7 @@ def save(fpath: str, style: str = "black", **kwargs):
 @lru_cache(maxsize=2)
 def get_shp() -> list:
     flist = get_shp_list()
-    shps = [list(ShpReader(i).geometries()) for i in flist]
+    shps = [list(ShpReader(i, encoding="gbk").geometries()) for i in flist]
     return shps