diff --git a/README.md b/README.md
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 ### :heart: Star :heart: the repo to support the project or :smile:[Follow Me](https://github.com/nb312).Thanks!
-Facebook Page | Facebook Group | Developer
---- | --- | ---
-[Flutter Open ](https://www.facebook.com/flutteropen) | [Flutter Open](https://www.facebook.com/groups/948618338674126/) | [NieBin](https://github.com/nb312)
+Facebook Page | Facebook Group | QQ Group | Developer |
+--- | --- | --- | ---
+[Flutter Open ](https://www.facebook.com/flutteropen) | [Flutter Open](https://www.facebook.com/groups/948618338674126/) |  963828159 |[NieBin](https://github.com/nb312)
 
 Article | Pictures   
  --- | --- 
- [ tutorial 01 How to use the canvas in the flutter?](https://medium.com/flutteropen/canvas-tutorial-01-how-to-use-the-canvas-in-the-flutter-8aade29ddc9)  | <img src="doc/circle_note.png" height="160" /> <img src="doc/flutter_note.png" height="160" />   <img src="doc/canvas_change.png" height="200" /> <img src="doc/result_280_320.png" height="200" /> 
- [tutorial 02 How to draw round angle polygon in the flutter?](https://medium.com/flutteropen/canvas-tutorial-02-how-to-draw-round-angle-polygon-in-the-flutter-7890e933cfb1)  |  <img src="doc/RoundPolygon/step_01.jpg" height="160" /> <img src="doc/RoundPolygon/step_02.jpg" height="160" /> <img src="doc/RoundPolygon/how_change_to_round_angle.png" height="200" /> <img src="doc/RoundPolygon/group08_2_no_yellow.png" height="200" /> <img src="doc/RoundPolygon/result_all.png" height="200" />   
+[Canvas tutorial 05 How to use the gesture with the custom painter in the flutter?](https://medium.com/flutteropen/canvas-tutorial-05-how-to-use-the-gesture-with-the-custom-painter-in-the-flutter-3fc4c2deca06) | <img src="doc/circle/circle_pie_chart.png" height= "200"/> <img src="doc/circle/pie_chart_tri.gif" height= "220"/>
+[Canvas tutorial 04 How to draw a pie chart and with a round angle in the flutter?](https://medium.com/flutteropen/canvas-tutorial-04-how-to-draw-a-pie-chart-and-with-a-round-angle-in-the-flutter-8a22126704f4) | <img src="doc/circle/principle.png" height= "200"/> <img src="doc/circle/circle_all_4.png" height= "220"/>
 [Canvas tutorial 03 How to draw a regular round angle polygon in the flutter?](https://medium.com/flutteropen/canvas-tutorial-03-how-to-draw-a-regular-round-angle-polygon-83b055b7af6c) | <img src="doc/RoundPolygon/regular_polygon.png" height= "160"/>
+[tutorial 02 How to draw round angle polygon in the flutter?](https://medium.com/flutteropen/canvas-tutorial-02-how-to-draw-round-angle-polygon-in-the-flutter-7890e933cfb1)  |  <img src="doc/RoundPolygon/step_01.jpg" height="160" /> <img src="doc/RoundPolygon/step_02.jpg" height="160" /> <img src="doc/RoundPolygon/how_change_to_round_angle.png" height="200" /> <img src="doc/RoundPolygon/group08_2_no_yellow.png" height="200" /> <img src="doc/RoundPolygon/result_all.png" height="200" />
+[ tutorial 01 How to use the canvas in the flutter?](https://medium.com/flutteropen/canvas-tutorial-01-how-to-use-the-canvas-in-the-flutter-8aade29ddc9)  | <img src="doc/circle_note.png" height="160" /> <img src="doc/flutter_note.png" height="160" />   <img src="doc/canvas_change.png" height="200" /> <img src="doc/result_280_320.png" height="200" />