diff --git a/model/用例2顺序图.png b/model/用例2顺序图.png
new file mode 100644
index 0000000..723489b
Binary files /dev/null and b/model/用例2顺序图.png differ
diff --git a/model/用例3顺序图.png b/model/用例3顺序图.png
new file mode 100644
index 0000000..be8d3af
Binary files /dev/null and b/model/用例3顺序图.png differ
diff --git a/model/用例一顺序图.png b/model/用例一顺序图.png
new file mode 100644
index 0000000..e13d31f
Binary files /dev/null and b/model/用例一顺序图.png differ