diff --git a/warm_up b/warm_up
new file mode 100644
index 0000000000000000000000000000000000000000..01bdf41910d2b2b31c51f5905ed81d999d36ed18
--- /dev/null
+++ b/warm_up
@@ -0,0 +1 @@
+欢迎你同学加入编译原理课程学习！
\ No newline at end of file