diff --git a/chartspy/base.py b/chartspy/base.py
index b161228..5ce017f 100644
--- a/chartspy/base.py
+++ b/chartspy/base.py
@@ -230,11 +230,10 @@ def json_type_convert(o: object):
             return o1.isoformat()
     elif isinstance(o, np.bool_):
         return bool(o)
-    elif isinstance(o, np.integer):
+    elif isinstance(o, (np.int_, np.intc, np.intp, np.int8, np.int16, np.int32, np.int64,
+                      np.uint8, np.uint16, np.uint32, np.uint64)):
         return int(o)
-    elif isinstance(o, np.floating):
-        return float(o)
-    elif isinstance(o, np.complexfloating):
+    elif isinstance(o, (np.float_, np.float16, np.float32, np.float64,np.complexfloating)):
         return float(o)
     elif isinstance(o, np.character):
         return str(o)
diff --git a/chartspy/express/echarts.py b/chartspy/express/echarts.py
index 52936f5..71a4124 100644
--- a/chartspy/express/echarts.py
+++ b/chartspy/express/echarts.py
@@ -1565,7 +1565,7 @@ def mark_label_echarts(data_frame: pd.DataFrame, x: str, y: str, label: str, tit
 
 
 def mark_vertical_line_echarts(data_frame: pd.DataFrame, x: str, label: str, title="vertical_line",
-                               label_position: str = 'middle', label_font_size: int = 10, label_distance: int = 10,
+                               label_position: str = 'insideStartTop', label_font_size: int = 10, label_distance: int = 10,
                                label_font_color: str = 'inherit',**kwargs):
     """
     在现有图表上叠加竖线，不能单独显示