diff --git a/Documentation~/en/api.md b/Documentation~/en/api.md
index 0424493e..599effa0 100644
--- a/Documentation~/en/api.md
+++ b/Documentation~/en/api.md
@@ -340,7 +340,7 @@ slug: /api
 |SetSeriePainterMaterial()||public void SetSeriePainterMaterial(Material material)<br/>设置Serie Painter的材质球 |
 |SetTopPainterMaterial()||public void SetTopPainterMaterial(Material material)<br/>设置Top Painter的材质球 |
 |SetUpperPainterMaterial()||public void SetUpperPainterMaterial(Material material)<br/>设置Upper Painter的材质球 |
-|TriggerTooltip()|v3.7.0|public bool TriggerTooltip(int dataIndex)<br/>trigger tooltip by data index. |
+|TriggerTooltip()|v3.7.0|public bool TriggerTooltip(int dataIndex, int serieIndex = 0)<br/>trigger tooltip by data index. |
 |TriggerTooltip()|v3.7.0|public bool TriggerTooltip(Vector3 localPosition)<br/>trigger tooltip by chart local position. |
 |TryAddChartComponent()||public bool TryAddChartComponent(Type type)|
 |TryAddChartComponent&lt;T&gt;()||public bool TryAddChartComponent&lt;T&gt;() where T : MainComponent|
diff --git a/Documentation~/zh/api.md b/Documentation~/zh/api.md
index c89e9ef7..6acc461a 100644
--- a/Documentation~/zh/api.md
+++ b/Documentation~/zh/api.md
@@ -340,7 +340,7 @@ slug: /api
 |SetSeriePainterMaterial()||public void SetSeriePainterMaterial(Material material)<br/>设置Serie Painter的材质球 |
 |SetTopPainterMaterial()||public void SetTopPainterMaterial(Material material)<br/>设置Top Painter的材质球 |
 |SetUpperPainterMaterial()||public void SetUpperPainterMaterial(Material material)<br/>设置Upper Painter的材质球 |
-|TriggerTooltip()|v3.7.0|public bool TriggerTooltip(int dataIndex)<br/>尝试触发指定数据项的Tooltip. |
+|TriggerTooltip()|v3.7.0|public bool TriggerTooltip(int dataIndex, int serieIndex = 0)<br/>尝试触发指定数据项的Tooltip. |
 |TriggerTooltip()|v3.7.0|public bool TriggerTooltip(Vector3 localPosition)<br/>在指定的位置尝试触发Tooltip. |
 |TryAddChartComponent()||public bool TryAddChartComponent(Type type)|
 |TryAddChartComponent&lt;T&gt;()||public bool TryAddChartComponent&lt;T&gt;() where T : MainComponent|
diff --git a/Documentation~/zh/changelog.md b/Documentation~/zh/changelog.md
index 20f5e8fa..5fc99394 100644
--- a/Documentation~/zh/changelog.md
+++ b/Documentation~/zh/changelog.md
@@ -68,6 +68,7 @@ slug: /changelog
 
 ## master
 
+* (2023.09.05) 修复`Ring`的`TriggerTooltip()`接口无效的问题
 * (2023.09.05) 修复`Radar`数据全为0时绘制报错的问题
 
 ## v3.8.0
diff --git a/Runtime/Internal/BaseChart.API.cs b/Runtime/Internal/BaseChart.API.cs
index c1d4de97..6c502c28 100644
--- a/Runtime/Internal/BaseChart.API.cs
+++ b/Runtime/Internal/BaseChart.API.cs
@@ -671,11 +671,12 @@ namespace XCharts.Runtime
         /// |尝试触发指定数据项的Tooltip.
         /// </summary>
         /// <param name="dataIndex">数据项索引</param>
+        /// <param name="serieIndex">Serie索引，默认为第0个Serie</param>
         /// <returns></returns>
         [Since("v3.7.0")]
-        public bool TriggerTooltip(int dataIndex)
+        public bool TriggerTooltip(int dataIndex, int serieIndex = 0)
         {
-            var serie = GetSerie(0);
+            var serie = GetSerie(serieIndex);
             if (serie == null) return false;
             var dataPoints = serie.context.dataPoints;
             var dataPoint = Vector3.zero;
diff --git a/Runtime/Serie/Ring/RingHandler.cs b/Runtime/Serie/Ring/RingHandler.cs
index 9ca6ccc9..40fc8c40 100644
--- a/Runtime/Serie/Ring/RingHandler.cs
+++ b/Runtime/Serie/Ring/RingHandler.cs
@@ -99,7 +99,7 @@ namespace XCharts.Runtime
             param.color = color;
             param.marker = SerieHelper.GetItemMarker(serie, serieData, marker);
             param.itemFormatter = SerieHelper.GetItemFormatter(serie, serieData, itemFormatter);
-            param.numericFormatter = SerieHelper.GetNumericFormatter(serie, serieData, numericFormatter); ;
+            param.numericFormatter = SerieHelper.GetNumericFormatter(serie, serieData, numericFormatter);
             param.columns.Clear();
 
             param.columns.Add(param.marker);
@@ -111,7 +111,7 @@ namespace XCharts.Runtime
 
         private Vector3 GetLabelLineEndPosition(Serie serie, SerieData serieData, LabelLine labelLine)
         {
-            if (labelLine == null || !labelLine.show) 
+            if (labelLine == null || !labelLine.show)
                 return serieData.context.labelLinePosition;
             var isRight = !serie.clockwise;
             var dire = isRight ? Vector3.right : Vector3.left;
@@ -207,10 +207,13 @@ namespace XCharts.Runtime
                 var startDegree = GetStartAngle(serie);
                 var toDegree = GetToAngle(serie, degree);
                 var insideRadius = outsideRadius - ringWidth;
+                var halfAngle = startDegree + (toDegree - startDegree) / 2;
+                var halfRadius = (outsideRadius + insideRadius) / 2;
                 serieData.context.startAngle = startDegree;
                 serieData.context.toAngle = toDegree;
                 serieData.context.insideRadius = insideRadius;
                 serieData.context.outsideRadius = serieData.radius > 0 ? serieData.radius : outsideRadius;
+                serieData.context.position = ChartHelper.GetPosition(serie.context.center, halfAngle, halfRadius);
                 UpdateLabelPosition(serieData);
             }
             AvoidLabelOverlap();