diff --git a/README.md b/README.md
index 1ff6086..3d54ad3 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # my-sample-repo
 This is just a sample repository.
+
+#David Jia was here.
diff --git a/README.md~ b/README.md~
new file mode 100644
index 0000000..1ff6086
--- /dev/null
+++ b/README.md~
@@ -0,0 +1,2 @@
+# my-sample-repo
+This is just a sample repository.