diff --git a/model/1.2.1用例图.drawio b/model/1.2.1用例图.drawio
new file mode 100644
index 0000000..23a2926
--- /dev/null
+++ b/model/1.2.1用例图.drawio
@@ -0,0 +1,15 @@
+<mxfile host="app.diagrams.net" agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.0" version="26.2.9">
+  <diagram name="第 1 页" id="7Rbx2kOBm--Bb2pzPm7S">
+    <mxGraphModel dx="1262" dy="709" 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" />
+        <UserObject label="" plantUmlData="{&#xa;  &quot;data&quot;: &quot;@startuml\nleft to right direction\nactor 用户 as User\n\nrectangle \&quot;小米便签\&quot; {\n  (一键删除当前内容) as Delete\n  (插入并调整图片) as InsertImage\n}\n\nUser --&gt; Delete : 触发\nUser --&gt; InsertImage : 触发\n@enduml\n&quot;,&#xa;  &quot;format&quot;: &quot;svg&quot;&#xa;}" id="snNDLMjfKHPp2QuFnc1l-1">
+          <mxCell style="shape=image;noLabel=1;verticalAlign=top;aspect=fixed;imageAspect=0;image=data:image/svg+xml,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;" vertex="1" parent="1">
+            <mxGeometry x="270" y="280" width="297" height="166" as="geometry" />
+          </mxCell>
+        </UserObject>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>
diff --git a/model/exception子包类图.drawio b/model/exception子包类图.drawio
new file mode 100644
index 0000000..b025fbc
--- /dev/null
+++ b/model/exception子包类图.drawio
@@ -0,0 +1 @@
+<mxGraphModel><root><mxCell id="0"/><mxCell id="1" parent="0"/></root></mxGraphModel>
\ No newline at end of file