diff --git a/03concurrency/0301/src/main/java/java0/conc0303/Homework03.java b/03concurrency/0301/src/main/java/java0/conc0303/Homework03.java
index dd7d4375..4e56c133 100644
--- a/03concurrency/0301/src/main/java/java0/conc0303/Homework03.java
+++ b/03concurrency/0301/src/main/java/java0/conc0303/Homework03.java
@@ -15,6 +15,8 @@ public static void main(String[] args) {
         
         long start=System.currentTimeMillis();
         // 在这里创建一个线程或线程池，
+
+
         // 异步执行 下面方法
     
         int result = sum(); //这是得到的返回值