diff --git a/README.md b/README.md
index 5c97452a..69fb2f65 100644
--- a/README.md
+++ b/README.md
@@ -61,23 +61,25 @@ The quick start gives a basic example of running client and server on the same m
 1. create maven project focus-quickstart and add dependencies to pom.
 
 ```xml
-<dependency>
-    <groupId>com.dinstone.focus</groupId>
-    <artifactId>focus-server-photon</artifactId>
-    <version>1.1.0</version>
-    <type>pom</type>
-</dependency>
-<dependency>
-    <groupId>com.dinstone.focus</groupId>
-    <artifactId>focus-client-photon</artifactId>
-    <version>1.1.0</version>
-    <type>pom</type>
-</dependency>
-<dependency>
-    <groupId>com.dinstone.focus</groupId>
-    <artifactId>focus-serialize-json</artifactId>
-    <version>1.1.0</version>
-</dependency>
+<dependencies>
+    <dependency>
+        <groupId>com.dinstone.focus</groupId>
+        <artifactId>focus-server-photon</artifactId>
+        <version>1.1.0</version>
+        <type>pom</type>
+    </dependency>
+    <dependency>
+        <groupId>com.dinstone.focus</groupId>
+        <artifactId>focus-client-photon</artifactId>
+        <version>1.1.0</version>
+        <type>pom</type>
+    </dependency>
+    <dependency>
+        <groupId>com.dinstone.focus</groupId>
+        <artifactId>focus-serialize-json</artifactId>
+        <version>1.1.0</version>
+    </dependency>
+</dependencies>
 ```
 
 2. create FooService interface.
diff --git a/focus-server/focus-server-nacos/src/main/java/com/dinstone/focus/server/nacos/NacosServiceResolver.java b/focus-server/focus-server-nacos/src/main/java/com/dinstone/focus/server/nacos/NacosServiceResolver.java
index fd2d4da9..c7d9674d 100644
--- a/focus-server/focus-server-nacos/src/main/java/com/dinstone/focus/server/nacos/NacosServiceResolver.java
+++ b/focus-server/focus-server-nacos/src/main/java/com/dinstone/focus/server/nacos/NacosServiceResolver.java
@@ -25,7 +25,7 @@
 
 public class NacosServiceResolver extends DefaultServiceResolver {
 
-    private NamingService namingService;
+    private final NamingService namingService;
 
     public NacosServiceResolver(NacosResolverOptions options) {
         try {
diff --git a/focus-server/focus-server-nacos/src/main/resources/META-INF/services/com.dinstone.focus.server.ResolverFactory b/focus-server/focus-server-nacos/src/main/resources/META-INF/services/com.dinstone.focus.server.ResolverFactory
index 4d961c31..db704a71 100644
--- a/focus-server/focus-server-nacos/src/main/resources/META-INF/services/com.dinstone.focus.server.ResolverFactory
+++ b/focus-server/focus-server-nacos/src/main/resources/META-INF/services/com.dinstone.focus.server.ResolverFactory
@@ -1 +1 @@
-com.dinstone.focus.server.nacos.NacosServiceResolver
\ No newline at end of file
+com.dinstone.focus.server.nacos.NacosResolverFactory
\ No newline at end of file
diff --git a/focus-starter/focus-client-starter/src/main/java/com/dinstone/focus/client/starter/ServiceReferenceRegistrar.java b/focus-starter/focus-client-starter/src/main/java/com/dinstone/focus/client/starter/ServiceReferenceRegistrar.java
index ab9777a8..125be3e1 100644
--- a/focus-starter/focus-client-starter/src/main/java/com/dinstone/focus/client/starter/ServiceReferenceRegistrar.java
+++ b/focus-starter/focus-client-starter/src/main/java/com/dinstone/focus/client/starter/ServiceReferenceRegistrar.java
@@ -65,12 +65,13 @@ public void registerBeanDefinitions(AnnotationMetadata metadata, BeanDefinitionR
                 AnnotatedBeanDefinition beanDefinition = (AnnotatedBeanDefinition) candidateComponent;
                 AnnotationMetadata annotationMetadata = beanDefinition.getMetadata();
                 Assert.isTrue(annotationMetadata.isInterface(),
-                        "@FocusReference can only be specified on an interface");
+                        "@ServiceReference can only be specified on an interface");
 
                 Map<String, Object> attributes = annotationMetadata
                         .getAnnotationAttributes(ServiceReference.class.getCanonicalName());
-
-                registerServiceReference(registry, annotationMetadata, attributes);
+                if (attributes != null) {
+                    registerServiceReference(registry, annotationMetadata, attributes);
+                }
             }
         }
 
@@ -100,10 +101,11 @@ private void registerServiceReference(BeanDefinitionRegistry registry, Annotatio
 
         BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(clazz);
         GenericBeanDefinition beanDefinition = (GenericBeanDefinition) builder.getBeanDefinition();
-        beanDefinition.getConstructorArgumentValues().addGenericArgumentValue(beanDefinition.getBeanClassName());
-        beanDefinition.setInstanceSupplier(() -> {
-            return factoryBean.getObject();
-        });
+        String beanClassName = beanDefinition.getBeanClassName();
+        if (beanClassName != null) {
+            beanDefinition.getConstructorArgumentValues().addGenericArgumentValue(beanClassName);
+        }
+        beanDefinition.setInstanceSupplier(factoryBean::getObject);
         beanDefinition.setFactoryBeanName(factoryBean.getClass().getSimpleName());
         beanDefinition.setLazyInit(true);
         beanDefinition.setPrimary(true);
@@ -111,12 +113,13 @@ private void registerServiceReference(BeanDefinitionRegistry registry, Annotatio
     }
 
     protected Set<String> getBasePackages(AnnotationMetadata metadata) {
-        Map<String, Object> attributes = metadata.getAnnotationAttributes(EnableFocusClient.class.getCanonicalName());
-
         Set<String> basePackages = new HashSet<>();
-        for (String pkg : (String[]) attributes.get("value")) {
-            if (StringUtils.hasText(pkg)) {
-                basePackages.add(pkg);
+        Map<String, Object> attributes = metadata.getAnnotationAttributes(EnableFocusClient.class.getCanonicalName());
+        if (attributes != null) {
+            for (String pkg : (String[]) attributes.get("value")) {
+                if (StringUtils.hasText(pkg)) {
+                    basePackages.add(pkg);
+                }
             }
         }
         if (basePackages.isEmpty()) {