diff --git a/Bin/SunnyUI.Demo.exe b/Bin/SunnyUI.Demo.exe
index fc62196c..e1de759e 100644
Binary files a/Bin/SunnyUI.Demo.exe and b/Bin/SunnyUI.Demo.exe differ
diff --git a/Bin/SunnyUI.dll b/Bin/SunnyUI.dll
index 1a60bf4c..9f79d611 100644
Binary files a/Bin/SunnyUI.dll and b/Bin/SunnyUI.dll differ
diff --git a/SunnyUI.Demo/Charts/FBarChart.cs b/SunnyUI.Demo/Charts/FBarChart.cs
index 1f1ac7a4..656f32f7 100644
--- a/SunnyUI.Demo/Charts/FBarChart.cs
+++ b/SunnyUI.Demo/Charts/FBarChart.cs
@@ -27,19 +27,19 @@ namespace Sunny.UI.Demo.Charts
             var series = new UIBarSeries();
             series.Name = "Bar1";
             series.AddData(1.1);
-            series.AddData(1.5);
-            series.AddData(1.2);
-            series.AddData(1.4);
-            series.AddData(1.3);
+            series.AddData(1.1);
+            series.AddData(1.1);
+            series.AddData(1.1);
+            series.AddData(1.1);
             option.Series.Add(series);
 
             series = new UIBarSeries();
             series.Name = "Bar2";
-            series.AddData(-2.2);
-            series.AddData(-2.8);
-            series.AddData(-2.5);
-            series.AddData(-2.3);
-            series.AddData(-2.4);
+            series.AddData(1.1);
+            series.AddData(1.1);
+            series.AddData(1.1);
+            series.AddData(1.1);
+            series.AddData(1.1);
             option.Series.Add(series);
 
             option.XAxis.Data.Add("Mon");
diff --git a/SunnyUI/Charts/UIBarChart.cs b/SunnyUI/Charts/UIBarChart.cs
index cc1d5fef..50b28f7b 100644
--- a/SunnyUI/Charts/UIBarChart.cs
+++ b/SunnyUI/Charts/UIBarChart.cs
@@ -139,11 +139,16 @@ namespace Sunny.UI
             if (!Option.YAxis.MaxAuto) max = Option.YAxis.Max;
             if (!Option.YAxis.MinAuto) min = Option.YAxis.Min;
 
-            if ((max - min).IsZero())
+            if ((max - min).IsZero() && min.IsZero())
             {
                 max = 100;
                 min = 0;
             }
+            else
+            {
+                if (max > 0) min = 0;
+                else max = 0;
+            }
 
             CalcDegreeScale(min, max, Option.YAxis.SplitNumber,
                 out int start, out int end, out double interval, out int decimalCount);
diff --git a/SunnyUI/Charts/UIBarChartEx.cs b/SunnyUI/Charts/UIBarChartEx.cs
index 086c8ed2..7689347f 100644
--- a/SunnyUI/Charts/UIBarChartEx.cs
+++ b/SunnyUI/Charts/UIBarChartEx.cs
@@ -67,11 +67,16 @@ namespace Sunny.UI
             if (!Option.YAxis.MaxAuto) max = Option.YAxis.Max;
             if (!Option.YAxis.MinAuto) min = Option.YAxis.Min;
 
-            if ((max - min).IsZero())
+            if ((max - min).IsZero() && min.IsZero())
             {
                 max = 100;
                 min = 0;
             }
+            else
+            {
+                if (max > 0) min = 0;
+                else max = 0;
+            }
 
             CalcDegreeScale(min, max, Option.YAxis.SplitNumber,
                 out int start, out int end, out double interval, out int decimalCount);