diff --git a/Assets/XCharts/CHANGELOG-EN.md b/Assets/XCharts/CHANGELOG-EN.md
index 5c29b5cb..105d2a1a 100644
--- a/Assets/XCharts/CHANGELOG-EN.md
+++ b/Assets/XCharts/CHANGELOG-EN.md
@@ -1,6 +1,7 @@
 
 # 更新日志
 
+* (2020.09.05) Optimize `LineChart` to display `XAxis1` without using `XAxis1`.
 * (2020.08.29) Added `toColor` and `toColor2` of `LineStyle` to set the horizontal gradient of `LineChart`. Cancel `ItemStyle` to set the horizontal gradient of `LineChart`.
 * (2020.08.29) Added the `onPointerClickPie` of `PieChart`, a callback function of click pie area.
 * (2020.08.29) Added the `onPointerClickBar` of `BarChart`, a callback function of click bar.
diff --git a/Assets/XCharts/CHANGELOG.md b/Assets/XCharts/CHANGELOG.md
index 14c6d429..a44e0b92 100644
--- a/Assets/XCharts/CHANGELOG.md
+++ b/Assets/XCharts/CHANGELOG.md
@@ -1,7 +1,8 @@
 
 # 更新日志
 
-* (2020.08.29) 增加`LineStyle`的`toColor`和`toColor2`设置`LineChart`的水平渐变，取消通过`ItemStyle`设置`LineChart`的水平渐变。
+* (2020.09.05) 优化`LineChart`在不使用`XAxis1`时也能显示`XAxis1`
+* (2020.08.29) 增加`LineStyle`的`toColor`和`toColor2`设置`LineChart`的水平渐变，取消通过`ItemStyle`设置`LineChart`的水平渐变
 * (2020.08.29) 增加`PieChart`的`onPointerClickPie`点击扇形图扇区回调
 * (2020.08.29) 增加`BarChart`的`onPointerClickBar`点击柱形图柱条回调
 * (2020.08.24) 发布`v1.6.0`版本
diff --git a/Assets/XCharts/Runtime/Internal/CoordinateChart.cs b/Assets/XCharts/Runtime/Internal/CoordinateChart.cs
index 3987f4f6..edada83f 100644
--- a/Assets/XCharts/Runtime/Internal/CoordinateChart.cs
+++ b/Assets/XCharts/Runtime/Internal/CoordinateChart.cs
@@ -1120,7 +1120,7 @@ namespace XCharts
                 var inverse = xAxis.IsValue() && xAxis.inverse;
                 var offset = AxisHelper.GetAxisLineSymbolOffset(xAxis);
                 var lineY = m_CoordinateY + (xAxis.axisLine.onZero ? m_YAxises[xAxisIndex].runtimeZeroYOffset : 0);
-                if (xAxis.IsValue() && xAxisIndex > 0) lineY += m_CoordinateHeight;
+                if (xAxisIndex > 0) lineY += m_CoordinateHeight;
                 var left = new Vector3(m_CoordinateX - xAxis.axisLine.width - (inverse ? offset : 0), lineY);
                 var right = new Vector3(m_CoordinateX + m_CoordinateWidth + xAxis.axisLine.width + (!inverse ? offset : 0), lineY);
                 ChartDrawer.DrawLine(vh, left, right, xAxis.axisLine.width, m_ThemeInfo.axisLineColor);
@@ -1134,7 +1134,7 @@ namespace XCharts
                 var offset = AxisHelper.GetAxisLineSymbolOffset(yAxis);
                 var inverse = yAxis.IsValue() && yAxis.inverse;
                 var lineX = m_CoordinateX + (yAxis.axisLine.onZero ? m_XAxises[yAxisIndex].runtimeZeroXOffset : 0);
-                if (yAxis.IsValue() && yAxisIndex > 0) lineX += m_CoordinateWidth;
+                if (yAxisIndex > 0) lineX += m_CoordinateWidth;
                 var bottom = new Vector3(lineX, m_CoordinateY - yAxis.axisLine.width - (inverse ? offset : 0));
                 var top = new Vector3(lineX, m_CoordinateY + m_CoordinateHeight + yAxis.axisLine.width + (!inverse ? offset : 0));
                 ChartDrawer.DrawLine(vh, bottom, top, yAxis.axisLine.width, m_ThemeInfo.axisLineColor);
@@ -1229,6 +1229,7 @@ namespace XCharts
                 var xAxis = m_XAxises[i];
                 var yAxis = m_YAxises[i];
                 if (!xAxis.show) continue;
+                if(m_Tooltip.runtimeXValues[i] < 0) continue;
                 float splitWidth = AxisHelper.GetDataWidth(xAxis, m_CoordinateWidth, dataCount, m_DataZoom);
                 switch (m_Tooltip.type)
                 {
@@ -1274,6 +1275,7 @@ namespace XCharts
                 var yAxis = m_YAxises[i];
                 var xAxis = m_XAxises[i];
                 if (!yAxis.show) continue;
+                if(m_Tooltip.runtimeYValues[i] < 0) continue;
                 float splitWidth = AxisHelper.GetDataWidth(yAxis, m_CoordinateHeight, dataCount, m_DataZoom);
                 switch (m_Tooltip.type)
                 {