diff --git a/landlords-client/src/main/java/org/nico/ratel/landlords/client/SimpleClient.java b/landlords-client/src/main/java/org/nico/ratel/landlords/client/SimpleClient.java
index 5511d97..bfc3979 100644
--- a/landlords-client/src/main/java/org/nico/ratel/landlords/client/SimpleClient.java
+++ b/landlords-client/src/main/java/org/nico/ratel/landlords/client/SimpleClient.java
@@ -1,10 +1,9 @@
 package org.nico.ratel.landlords.client;
 
-import io.netty.bootstrap.Bootstrap;
-import io.netty.channel.Channel;
-import io.netty.channel.EventLoopGroup;
-import io.netty.channel.nio.NioEventLoopGroup;
-import io.netty.channel.socket.nio.NioSocketChannel;
+import java.io.IOException;
+import java.net.URL;
+import java.util.List;
+
 import org.nico.noson.Noson;
 import org.nico.noson.entity.NoType;
 import org.nico.ratel.landlords.client.handler.DefaultChannelInitializer;
@@ -12,9 +11,11 @@
 import org.nico.ratel.landlords.print.SimpleWriter;
 import org.nico.ratel.landlords.utils.StreamUtils;
 
-import java.io.IOException;
-import java.net.URL;
-import java.util.List;
+import io.netty.bootstrap.Bootstrap;
+import io.netty.channel.Channel;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.nio.NioSocketChannel;
 
 public class SimpleClient {
 
@@ -22,7 +23,12 @@ public class SimpleClient {
 
 	public static String serverAddress;
 
-	public static int port;
+	public static int port = 80;
+
+	private static String[] serverAddressSource = new String[] {
+			"https://raw.githubusercontent.com/ainilili/ratel/master/serverlist.json",
+			"https://gitee.com/ainilili/ratel/raw/master/serverlist.json"
+	};
 
 	public static void main(String[] args) throws InterruptedException, IOException {
 		if(args != null && args.length > 0) {
@@ -37,16 +43,19 @@ public static void main(String[] args) throws InterruptedException, IOException
 				}
 			}
 		}
-
-		if(serverAddress == null || port == 0){
-			String serverInfo = StreamUtils.convertToString(new URL("https://raw.githubusercontent.com/ainilili/ratel/master/serverlist.json"));
-			List<String> serverAddressList = Noson.convert(serverInfo, new NoType<List<String>>() {});
+		
+		if(serverAddress == null){
+			List<String> serverAddressList = getServerAddressList();
+			if(serverAddressList == null || serverAddressList.size() == 0) {
+				throw new RuntimeException("Please use '-host' to setting server address.");
+			}
+			
 			SimplePrinter.printNotice("Please select a server:");
 			for(int i = 0; i < serverAddressList.size(); i++) {
 				SimplePrinter.printNotice((i+1) + ". " + serverAddressList.get(i));
 			}
 			int serverPick = Integer.parseInt(SimpleWriter.write("option"));
-			while(serverPick<1 || serverPick>serverAddressList.size()){
+			while(serverPick < 1 || serverPick > serverAddressList.size()){
 				try {
 					SimplePrinter.printNotice("The server address does not exist!");
 					serverPick = Integer.parseInt(SimpleWriter.write("option"));
@@ -70,7 +79,18 @@ public static void main(String[] args) throws InterruptedException, IOException
 		} finally {
 			group.shutdownGracefully().sync();
 		}
+	}
 
+	private static List<String> getServerAddressList(){
+		for(String serverAddressSource: serverAddressSource) {
+			try {
+				String serverInfo = StreamUtils.convertToString(new URL(serverAddressSource));
+				return  Noson.convert(serverInfo, new NoType<List<String>>() {});
+			} catch (IOException e) {
+				SimplePrinter.printNotice("Try connected " + serverAddressSource + " failed: " + e.getMessage());
+			}
+		}
+		return null;
 	}
 
 }
diff --git a/landlords-common/src/main/java/org/nico/ratel/landlords/utils/StreamUtils.java b/landlords-common/src/main/java/org/nico/ratel/landlords/utils/StreamUtils.java
index eda30cf..c3db2dc 100644
--- a/landlords-common/src/main/java/org/nico/ratel/landlords/utils/StreamUtils.java
+++ b/landlords-common/src/main/java/org/nico/ratel/landlords/utils/StreamUtils.java
@@ -41,6 +41,7 @@ public static String convertToString(InputStream inStream){
 	public static String convertToString(URL url) throws IOException {
 		URLConnection con = url.openConnection();
 		con.setUseCaches(false);
+		con.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.193 Safari/537.36");
 		return convertToString(con.getInputStream());
 	}