diff --git a/doc/视频教程.md b/doc/视频教程.md
index 05ec95f7..11b04729 100644
--- a/doc/视频教程.md
+++ b/doc/视频教程.md
@@ -91,4 +91,7 @@ Javassist字节码增强序列化函数比反射快非常多
 ### [第九讲](https://www.bilibili.com/video/BV1rL411W7bo)
 
 - net原理讲解
-- 知识点
\ No newline at end of file
+- 知识点
+```
+netty的nio
+```
\ No newline at end of file
diff --git a/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoClientTest.java b/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoClientTest.java
index cb577512..d96d25a2 100644
--- a/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoClientTest.java
+++ b/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoClientTest.java
@@ -30,7 +30,8 @@ public class EchoClientTest {
     public void connect(int port, String host) {
         EventLoopGroup group = new NioEventLoopGroup();
         Bootstrap bootstrap = new Bootstrap();
-        bootstrap.group(group).channel(NioSocketChannel.class)
+        bootstrap.group(group)
+                .channel(NioSocketChannel.class)
                 .option(ChannelOption.TCP_NODELAY, true)
                 .handler(new ChildChannelHandler());
         ChannelFuture future = null;
diff --git a/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoServerTest.java b/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoServerTest.java
index cae69b59..28bdd8ad 100644
--- a/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoServerTest.java
+++ b/net/src/test/java/com/zfoo/net/base/netty/echoserver1/EchoServerTest.java
@@ -42,8 +42,10 @@ public class EchoServerTest {
         EventLoopGroup workerGroup = new NioEventLoopGroup();//SocketChannel的网络读写
         try {
             ServerBootstrap bootstrap = new ServerBootstrap();
-            bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
-                    .option(ChannelOption.SO_BACKLOG, 100).handler(new LoggingHandler(LogLevel.INFO))
+            bootstrap.group(bossGroup, workerGroup)
+                    .channel(NioServerSocketChannel.class)
+                    .option(ChannelOption.SO_BACKLOG, 100)
+                    .handler(new LoggingHandler(LogLevel.INFO))
                     .childHandler(new ChildChannelHandler());
 
             //绑定端口，同步等待成功