diff --git a/src/BUILD.gn b/src/BUILD.gn
index 4b8a86442e48099ea2a39ecd14e20e965dcb3c76..a205f3fe1fca8b45b121aa816c62403b2c30545d 100644
--- a/src/BUILD.gn
+++ b/src/BUILD.gn
@@ -12,6 +12,9 @@
 # FIT FOR A PARTICULAR PURPOSE.
 # See the Mulan PSL v1 for more details.
 #
+
+#hello world@
+
 config("mapleallcompilecfg") {
   cflags_cc = []
   cflags_cc += [