diff --git a/fork_userid.txt b/fork_userid.txt
new file mode 100644
index 0000000000000000000000000000000000000000..46f77570f14bba87bb9d1e24fd690771afeb6cd3
--- /dev/null
+++ b/fork_userid.txt
@@ -0,0 +1,2 @@
+forked
+userid is ryun@ajou.ac.kr