diff --git a/func/Module_SA_label_v2.py b/func/Module_SA_label_v2.py
index b2e9010..59f13f1 100644
--- a/func/Module_SA_label_v2.py
+++ b/func/Module_SA_label_v2.py
@@ -12,7 +12,7 @@ from matplotlib import gridspec
 from matplotlib.backends.backend_qt import NavigationToolbar2QT
 from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg
 from matplotlib.collections import PolyCollection
-from matplotlib.patches import Rectangle
+from matplotlib.patches import Rectangle, Polygon
 
 from numpy import array, zeros, append, linspace, place, nan
 from overrides import overrides
@@ -2004,15 +2004,16 @@ class MainWindow_SA_label(QMainWindow):
 
     def __get_x_and_width__(self, event_rect):
         """Get the width of a rectangle in data coordinates."""
-        # pyside6.9.0 axvspan 返回的是一个Rectangle对象
-        # pyside6.9.1 axvspan 返回的是一个PolyCollection对象
+        # matplotlib >=3.9 axvspan 返回的是一个Rectangle对象
+        # matplorlib < 3.9 axvspan 返回的是一个PolyCollection对象
         if isinstance(event_rect, Rectangle):
             x = event_rect.get_x()
             width = event_rect.get_width()
-        elif isinstance(event_rect, PolyCollection):
-            verts = event_rect.get_paths()[0].vertices
+        elif isinstance(event_rect, Polygon):
+            verts = event_rect.get_xy()
             x = verts[0, 0]
             width = verts[2, 0] - verts[0, 0]
+
         else:
             raise TypeError("Unsupported event_rect type")
         return x, width