diff --git a/Chapter9-1-5/api-gateway/pom.xml b/Chapter9-1-5/api-gateway/pom.xml
new file mode 100644
index 0000000..1a80d78
--- /dev/null
+++ b/Chapter9-1-5/api-gateway/pom.xml
@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.didispace</groupId>
+	<artifactId>api-gateway</artifactId>
+	<version>1.0.0</version>
+	<packaging>jar</packaging>
+
+	<name>api-gateway</name>
+	<description>Spring Cloud project</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.3.5.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-zuul</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-eureka</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+	</dependencies>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-dependencies</artifactId>
+				<version>Brixton.RELEASE</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+	
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file
diff --git a/Chapter9-1-5/api-gateway/src/main/java/com/didispace/Application.java b/Chapter9-1-5/api-gateway/src/main/java/com/didispace/Application.java
new file mode 100644
index 0000000..225959c
--- /dev/null
+++ b/Chapter9-1-5/api-gateway/src/main/java/com/didispace/Application.java
@@ -0,0 +1,15 @@
+package com.didispace;
+
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.cloud.client.SpringCloudApplication;
+import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
+
+@EnableZuulProxy
+@SpringCloudApplication
+public class Application {
+
+	public static void main(String[] args) {
+		new SpringApplicationBuilder(Application.class).web(true).run(args);
+	}
+
+}
diff --git a/Chapter9-1-5/api-gateway/src/main/resources/application.properties b/Chapter9-1-5/api-gateway/src/main/resources/application.properties
new file mode 100644
index 0000000..64abddd
--- /dev/null
+++ b/Chapter9-1-5/api-gateway/src/main/resources/application.properties
@@ -0,0 +1,17 @@
+spring.application.name=api-gateway
+server.port=5555
+
+zuul.ignoredServices="*"
+
+# routes to serviceId
+zuul.routes.api-a.path=/api-a/**
+zuul.routes.api-a.serviceId=service-A
+
+zuul.routes.api-b.path=/api-b/**
+zuul.routes.api-b.serviceId=service-B
+
+# routes to url
+zuul.routes.api-a-url.path=/api-a-url/**
+zuul.routes.api-a-url.url=http://localhost:2222/
+
+eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/
\ No newline at end of file
diff --git a/Chapter9-1-5/service-A/src/main/java/com/didispace/web/ComputeController.java b/Chapter9-1-5/service-A/src/main/java/com/didispace/web/ComputeController.java
index 06dff1f..6024f1c 100644
--- a/Chapter9-1-5/service-A/src/main/java/com/didispace/web/ComputeController.java
+++ b/Chapter9-1-5/service-A/src/main/java/com/didispace/web/ComputeController.java
@@ -18,11 +18,11 @@ public class ComputeController {
     private DiscoveryClient client;
 
     @RequestMapping(value = "/add" ,method = RequestMethod.GET)
-    public Integer add(@RequestParam Integer a, @RequestParam Integer b) {
+    public String add(@RequestParam Integer a, @RequestParam Integer b) {
         ServiceInstance instance = client.getLocalServiceInstance();
         Integer r = a + b;
         logger.info("/add, host:" + instance.getHost() + ", service_id:" + instance.getServiceId() + ", result:" + r);
-        return r;
+        return "From Service-A, Result is " + r;
     }
 
 }
\ No newline at end of file
diff --git a/Chapter9-1-5/service-B/src/main/java/com/didispace/web/ComputeController.java b/Chapter9-1-5/service-B/src/main/java/com/didispace/web/ComputeController.java
index 06dff1f..31af894 100644
--- a/Chapter9-1-5/service-B/src/main/java/com/didispace/web/ComputeController.java
+++ b/Chapter9-1-5/service-B/src/main/java/com/didispace/web/ComputeController.java
@@ -18,11 +18,11 @@ public class ComputeController {
     private DiscoveryClient client;
 
     @RequestMapping(value = "/add" ,method = RequestMethod.GET)
-    public Integer add(@RequestParam Integer a, @RequestParam Integer b) {
+    public String add(@RequestParam Integer a, @RequestParam Integer b) {
         ServiceInstance instance = client.getLocalServiceInstance();
         Integer r = a + b;
         logger.info("/add, host:" + instance.getHost() + ", service_id:" + instance.getServiceId() + ", result:" + r);
-        return r;
+        return "From Service-B, Result is " + r;
     }
 
 }
\ No newline at end of file