diff --git a/make_chart.drawio b/make_chart.drawio
new file mode 100644
index 0000000..5910143
--- /dev/null
+++ b/make_chart.drawio
@@ -0,0 +1,25 @@
+<mxfile host="65bd71144e">
+    <diagram id="0uuTY4-XFXE3oc_kBmGN" name="第 1 页">
+        <mxGraphModel dx="1072" dy="568" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="4" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="2" target="3">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="2" value="make_chart" style="ellipse;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="260" y="50" width="110" height="70" as="geometry"/>
+                </mxCell>
+                <mxCell id="6" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="3" target="5">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="3" value="&lt;span style=&quot;color: rgb(51, 51, 51); font-family: &amp;quot;Microsoft YaHei&amp;quot;, Helvetica, &amp;quot;Meiryo UI&amp;quot;, &amp;quot;Malgun Gothic&amp;quot;, &amp;quot;Segoe UI&amp;quot;, &amp;quot;Trebuchet MS&amp;quot;, Monaco, monospace, Tahoma, STXihei, 华文细黑, STHeiti, &amp;quot;Helvetica Neue&amp;quot;, &amp;quot;Droid Sans&amp;quot;, &amp;quot;wenquanyi micro hei&amp;quot;, FreeSans, Arimo, Arial, SimSun, 宋体, Heiti, 黑体, sans-serif; font-size: 16px; text-align: justify; background-color: rgb(255, 255, 255);&quot;&gt;以图表方式显示库存记录&lt;/span&gt;" style="whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="255" y="205" width="120" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="5" value="结束" style="ellipse;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="267.5" y="340" width="95" height="55" as="geometry"/>
+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>
\ No newline at end of file
diff --git a/make_chart.svg b/make_chart.svg
new file mode 100644
index 0000000..e69de29