diff --git a/Concurrency/Concurrency b/Concurrency/Concurrency
index 25444cf..040d3f1 100644
--- a/Concurrency/Concurrency
+++ b/Concurrency/Concurrency
@@ -7,3 +7,5 @@ golang的并发通过goroutine实现，goroutine是用户态的线程，由go的
 最终还是放在操作系统的线程去执行，只不过管理（上下文切换）放在用户态，所以开销较小。
 
 golang提供channel用来在多个goroutine之间进行通信。
+
+通过go 关键字来开启一个goroutine
diff --git a/Concurrency/Concurrency.go b/Concurrency/Concurrency.go
index 7905807..6c0b270 100644
--- a/Concurrency/Concurrency.go
+++ b/Concurrency/Concurrency.go
@@ -1,5 +1,25 @@
 package main
 
+import (
+	"fmt"
+	"time"
+)
+
+func hello() {
+	fmt.Println("hello")
+}
+
+// 主goroutine开启,之后所有的子协程都会自行退出
 func main() {
 
+	//通过匿名函数开启goroutine
+	for i := 0; i < 10; i++ {
+		go func() {
+			fmt.Println(i)
+		}() //事实上这个函数中的i去找到的是上面这个循环的i，所以当goroutine启动过快有可能在一个循环中找到i
+
+	}
+	fmt.Println("this is main,2")
+	time.Sleep(time.Second)
+
 }