diff --git a/1.txt b/1.txt
index 6a7612c..007c202 100644
--- a/1.txt
+++ b/1.txt
@@ -1,4 +1,5 @@
 aaa
+zzfan modify 1.txt
 aaa
 aaa
 aaa
diff --git a/dev-zzfan-4.txt b/dev-zzfan-4.txt
new file mode 100644
index 0000000..b805d42
--- /dev/null
+++ b/dev-zzfan-4.txt
@@ -0,0 +1 @@
+dev zzfan 44