diff --git a/README.md b/README.md
index e354a72..d9ce098 100644
--- a/README.md
+++ b/README.md
@@ -285,3 +285,11 @@ Step 2: 打开文件
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
+
+### print_data
+### query_data
+### add_data
+### update_data
+### delete_data
+### sort_data
+### make_chart
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diff --git a/save_data.drawio b/save_data.drawio
new file mode 100644
index 0000000..c091ae1
--- /dev/null
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diff --git a/save_data.svg b/save_data.svg
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index 0000000..3775e51
--- /dev/null
+++ b/save_data.svg
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