diff --git a/lib/domains/cn/edu/cczu.txt b/lib/domains/cn/edu/cczu.txt
deleted file mode 100644
index c2adb7d52c..0000000000
--- a/lib/domains/cn/edu/cczu.txt
+++ /dev/null
@@ -1 +0,0 @@
-Changzhou University
diff --git a/lib/domains/cn/edu/cczu/smail.txt b/lib/domains/cn/edu/cczu/smail.txt
new file mode 100644
index 0000000000..e5cb74cfbf
--- /dev/null
+++ b/lib/domains/cn/edu/cczu/smail.txt
@@ -0,0 +1 @@
+Changzhou University
\ No newline at end of file