diff --git a/HelloWorld.java b/HelloWorld.java
index 6bfb23a..ad1f2f4 100644
--- a/HelloWorld.java
+++ b/HelloWorld.java
@@ -1,5 +1,5 @@
  public class HelloWorld {
      public static void main(String[] args) {
-         System.out.println("Hello world!");
+         System.out.println("Hello world");
      }
  }
\ No newline at end of file
diff --git a/README.md b/README.md
index 95d09f2..8939daa 100644
--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-hello world
\ No newline at end of file
+hello world！
\ No newline at end of file