diff --git a/README.md b/README.md
index d491cac..4ee21e5 100644
--- a/README.md
+++ b/README.md
@@ -351,7 +351,7 @@ Step 3: if 打开文件失败 then 提示打开文件失败并结束
 Step 4: 将所有库存记录写入文件
 Step 5: 关闭文件
 
-![](pictures/save.drawio.svg)
+![](pictures/save_data.drawio.svg)
 
 #### make_chart
 
diff --git a/pictures/save.drawio.svg b/pictures/save_data.drawio.svg
similarity index 88%
rename from pictures/save.drawio.svg
rename to pictures/save_data.drawio.svg
index 403fb87..47de788 100644
--- a/pictures/save.drawio.svg
+++ b/pictures/save_data.drawio.svg
@@ -1,4 +1,4 @@
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+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="341px" height="701px" viewBox="-0.5 -0.5 341 701" content="&lt;mxfile&gt;&lt;diagram id=&quot;upyrMhvOQVLzjFjaz9En&quot; name=&quot;Page-1&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
     <defs/>
     <g>
         <path d="M 80 70 L 80 103.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
@@ -22,8 +22,6 @@
                 </text>
             </switch>
         </g>
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-        <path d="M 76.86 198.89 L 73.74 191.72 L 77.14 193.65 L 80.73 192.09 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>
         <path d="M 80 400 L 80 413.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
         <path d="M 80 418.88 L 76.5 411.88 L 80 413.63 L 83.5 411.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
         <path d="M 40 332.5 L 71.28 314.9 Q 80 310 88.72 314.9 L 151.28 350.1 Q 160 355 151.28 359.9 L 88.72 395.1 Q 80 400 71.28 395.1 L 8.72 359.9 Q 0 355 8.72 350.1 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/>