diff --git a/__test__/Geometry/__snapshots__/circle.test.ts.snap b/__test__/Geometry/__snapshots__/circle.test.ts.snap
index 18dfeb2b1..856d2a244 100644
--- a/__test__/Geometry/__snapshots__/circle.test.ts.snap
+++ b/__test__/Geometry/__snapshots__/circle.test.ts.snap
@@ -2,7 +2,7 @@
 
 exports[`圆偏移 1`] = `
 Vector3 {
-  "x": 2,
+  "x": 7,
   "y": 0,
   "z": 0,
 }
@@ -10,7 +10,7 @@ Vector3 {
 
 exports[`圆偏移 2`] = `
 Vector3 {
-  "x": 2,
+  "x": 7,
   "y": 0,
   "z": 0,
 }
@@ -18,7 +18,7 @@ Vector3 {
 
 exports[`圆偏移 3`] = `
 Vector3 {
-  "x": 5,
+  "x": 15,
   "y": 0,
   "z": 0,
 }
@@ -26,7 +26,7 @@ Vector3 {
 
 exports[`圆偏移 4`] = `
 Vector3 {
-  "x": 5,
+  "x": 15,
   "y": 0,
   "z": 0,
 }
@@ -34,7 +34,7 @@ Vector3 {
 
 exports[`圆偏移 5`] = `
 Vector3 {
-  "x": 20,
+  "x": 30,
   "y": 0,
   "z": 0,
 }
@@ -42,7 +42,7 @@ Vector3 {
 
 exports[`圆偏移 6`] = `
 Vector3 {
-  "x": 20,
+  "x": 30,
   "y": 0,
   "z": 0,
 }
@@ -50,7 +50,7 @@ Vector3 {
 
 exports[`圆偏移 7`] = `
 Vector3 {
-  "x": 20,
+  "x": 30,
   "y": 0,
   "z": 0,
 }
@@ -58,7 +58,7 @@ Vector3 {
 
 exports[`圆偏移 8`] = `
 Vector3 {
-  "x": 20,
+  "x": 30,
   "y": 0,
   "z": 0,
 }
@@ -66,7 +66,7 @@ Vector3 {
 
 exports[`圆偏移 9`] = `
 Vector3 {
-  "x": 5,
+  "x": 15,
   "y": 0,
   "z": 0,
 }
@@ -74,7 +74,7 @@ Vector3 {
 
 exports[`圆偏移 10`] = `
 Vector3 {
-  "x": 5,
+  "x": 15,
   "y": 0,
   "z": 0,
 }
diff --git a/src/DatabaseServices/Circle.ts b/src/DatabaseServices/Circle.ts
index d83fcb0ab..ccad524bf 100644
--- a/src/DatabaseServices/Circle.ts
+++ b/src/DatabaseServices/Circle.ts
@@ -1,5 +1,5 @@
 import * as THREE from 'three';
-import { Box3, EllipseCurve, Geometry, Object3D, Vector3, Shape } from 'three';
+import { Box3, EllipseCurve, Geometry, Object3D, Vector3, Shape, Quaternion } from 'three';
 import { arrayLast, arrayRemoveDuplicateBySort } from '../Common/ArrayExt';
 import { ColorMaterial } from '../Common/ColorPalette';
 import { clamp } from '../Common/Utils';
@@ -55,9 +55,7 @@ export class Circle extends Curve
 
     get StartPoint(): Vector3 
     {
-        let startPt = new Vector3(this.m_Radius, 0, 0);
-        this.Center.clone().add(startPt);
-        return startPt;
+        return this.GetPointAtParam(0);
     }
     get StartParam(): number 
     {
@@ -65,9 +63,7 @@ export class Circle extends Curve
     }
     get EndPoint(): Vector3 
     {
-        let endPt = new Vector3(this.m_Radius, 0, 0);
-        this.Center.clone().add(endPt);
-        return endPt;
+        return this.GetPointAtParam(0);
     }
     get EndParam(): number 
     {