diff --git a/README.md b/README.md
index 21eee35..c8de0a5 100644
--- a/README.md
+++ b/README.md
@@ -239,4 +239,3 @@ a: No such file or directory
（delete_data）、数据排序（sort_data）和生成图表（make_chart）等子模块。其中查询、添加、更
新和删除数据还会用到根据编号查询数据的方法（find）。
-1
\ No newline at end of file
diff --git a/sava_data.drawio b/sava_data.drawio
new file mode 100644
index 0000000..52265d3
--- /dev/null
+++ b/sava_data.drawio
@@ -0,0 +1,68 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/sava_data.svg b/sava_data.svg
new file mode 100644
index 0000000..5ba038c
--- /dev/null
+++ b/sava_data.svg
@@ -0,0 +1 @@
+
\ No newline at end of file