diff --git a/doc/支付系统订单状态图.drawio b/doc/支付系统订单状态图.drawio
new file mode 100644
index 0000000..090dedc
--- /dev/null
+++ b/doc/支付系统订单状态图.drawio
@@ -0,0 +1,181 @@
+<mxfile host="65bd71144e">
+    <diagram id="OUCQybPowJdnNh2YIqGc" name="第 1 页">
+        <mxGraphModel dx="1173" dy="766" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="2" value="" style="ellipse;html=1;shape=startState;fillColor=#000000;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="399" y="70" width="30" height="30" as="geometry"/>
+                </mxCell>
+                <mxCell id="3" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;" edge="1" source="2" parent="1" target="5">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="414" y="250" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="4" value="创建订单" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="3">
+                    <mxGeometry x="-0.1879" y="-1" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="5" value="未支付" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="354" y="180" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="6" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" source="5" parent="1" target="8">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="414" y="350" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="7" value="支付" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="6">
+                    <mxGeometry x="-0.2513" y="-1" relative="1" as="geometry">
+                        <mxPoint x="1" y="13" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="8" value="已支付" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="354" y="320" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="9" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;" edge="1" source="8" parent="1" target="14">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="240" y="400" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="10" value="申请开票" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="9">
+                    <mxGeometry x="-0.2606" relative="1" as="geometry">
+                        <mxPoint x="-7" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="13" value="" style="ellipse;html=1;shape=endState;fillColor=#000000;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="300" y="680" width="30" height="30" as="geometry"/>
+                </mxCell>
+                <mxCell id="14" value="待开票" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="165" y="410" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="15" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;" edge="1" source="14" parent="1" target="17">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="225" y="540" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="16" value="同意开票" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="15">
+                    <mxGeometry x="-0.2741" y="1" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="17" value="已开票" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="165" y="550" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="18" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;entryX=0;entryY=0.5;entryDx=0;entryDy=0;exitX=0.5;exitY=1;exitDx=0;exitDy=0;" edge="1" source="17" parent="1" target="13">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="225" y="650" as="targetPoint"/>
+                        <Array as="points">
+                            <mxPoint x="225" y="695"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="19" value="下载发票" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="18">
+                    <mxGeometry x="-0.2583" y="-1" relative="1" as="geometry">
+                        <mxPoint x="1" y="-7" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="21" value="开票失败" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="10" y="470" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="22" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=0.75;entryY=0;entryDx=0;entryDy=0;" edge="1" source="14" parent="1" target="21">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="430" y="560" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="23" value="不同意开票" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="22">
+                    <mxGeometry x="-0.1415" y="-1" relative="1" as="geometry">
+                        <mxPoint x="3" y="1" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="25" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;entryX=0.25;entryY=0;entryDx=0;entryDy=0;exitX=0.25;exitY=0;exitDx=0;exitDy=0;" edge="1" parent="1" source="21" target="14">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="430" y="560" as="targetPoint"/>
+                        <mxPoint x="295" y="440" as="sourcePoint"/>
+                        <Array as="points">
+                            <mxPoint x="40" y="380"/>
+                            <mxPoint x="195" y="380"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="26" value="再次申请开票" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="25">
+                    <mxGeometry x="-0.1415" y="-1" relative="1" as="geometry">
+                        <mxPoint x="19" y="-1" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="27" value="待退款" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="354" y="440" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="28" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" source="27" parent="1" target="32">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="414" y="510" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="34" value="同意退款" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="28">
+                    <mxGeometry x="-0.2333" y="-2" relative="1" as="geometry">
+                        <mxPoint x="-2" y="3" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="30" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;exitX=0.5;exitY=1;exitDx=0;exitDy=0;" edge="1" parent="1" source="8" target="27">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="424" y="520" as="targetPoint"/>
+                        <mxPoint x="424" y="460" as="sourcePoint"/>
+                        <Array as="points">
+                            <mxPoint x="414" y="390"/>
+                            <mxPoint x="414" y="390"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="31" value="申请退款" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="30">
+                    <mxGeometry x="0.2333" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="32" value="已退款" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="354" y="550" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="33" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;entryX=1;entryY=0.5;entryDx=0;entryDy=0;" edge="1" source="32" parent="1" target="13">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="414" y="640" as="targetPoint"/>
+                        <Array as="points">
+                            <mxPoint x="414" y="695"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="35" value="退款到账" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="33">
+                    <mxGeometry x="0.0112" y="3" relative="1" as="geometry">
+                        <mxPoint x="-3" y="-41" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="36" value="退款失败" style="rounded=1;whiteSpace=wrap;html=1;arcSize=40;fontColor=#000000;fillColor=#ffffc0;strokeColor=#ff0000;" vertex="1" parent="1">
+                    <mxGeometry x="580" y="510" width="120" height="40" as="geometry"/>
+                </mxCell>
+                <mxCell id="37" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0.25;entryY=0;entryDx=0;entryDy=0;" edge="1" source="27" parent="1" target="36">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="640" y="610" as="targetPoint"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="38" value="拒绝退款" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="37">
+                    <mxGeometry x="-0.4012" y="2" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="40" value="" style="edgeStyle=orthogonalEdgeStyle;html=1;verticalAlign=bottom;endArrow=open;endSize=8;strokeColor=#ff0000;entryX=0.75;entryY=0;entryDx=0;entryDy=0;exitX=0.75;exitY=0;exitDx=0;exitDy=0;" edge="1" parent="1" source="36" target="27">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="650" y="520" as="targetPoint"/>
+                        <mxPoint x="690" y="400" as="sourcePoint"/>
+                        <Array as="points">
+                            <mxPoint x="670" y="400"/>
+                            <mxPoint x="444" y="400"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="41" value="再次申请退款" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="40">
+                    <mxGeometry x="-0.4012" y="2" relative="1" as="geometry">
+                        <mxPoint x="-75" y="-2" as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>
\ No newline at end of file