diff --git a/src/Qcloud/Cos/Client.php b/src/Qcloud/Cos/Client.php
index fadd0cd9..9c65dfd1 100644
--- a/src/Qcloud/Cos/Client.php
+++ b/src/Qcloud/Cos/Client.php
@@ -34,7 +34,7 @@ public function __construct($cosConfig) {
         $this->rawCosConfig = $cosConfig;
         $this->cosConfig['schema'] = isset($cosConfig['schema']) ? $cosConfig['schema'] : 'http';
         $this->cosConfig['endpoint'] = isset($cosConfig['endpoint']) ? $cosConfig['endpoint'] : null;
-        $this->cosConfig['region'] =  isset($regionmap[$cosConfig['region']]) ? region_map($cosConfig['region']) : $cosConfig['region'];
+        $this->cosConfig['region'] =  region_map($cosConfig['region']);
         $this->cosConfig['appId'] = isset($cosConfig['credentials']['appId']) ? $cosConfig['credentials']['appId'] : null;
         $this->cosConfig['secretId'] = isset($cosConfig['credentials']['secretId']) ? $cosConfig['credentials']['secretId'] : "";
         $this->cosConfig['secretKey'] = isset($cosConfig['credentials']['secretKey']) ? $cosConfig['credentials']['secretKey'] : "";
diff --git a/src/Qcloud/Cos/Common.php b/src/Qcloud/Cos/Common.php
index 03bab953..c188002e 100644
--- a/src/Qcloud/Cos/Common.php
+++ b/src/Qcloud/Cos/Common.php
@@ -2,7 +2,8 @@
 
 namespace Qcloud\Cos;
 
-$regionmap = array('cn-east'=>'ap-shanghai',
+function region_map($region) {
+    $regionmap = array('cn-east'=>'ap-shanghai',
             'cn-south'=>'ap-guangzhou',
             'cn-north'=>'ap-beijing-1',
             'cn-south-2'=>'ap-guangzhou-2',
@@ -13,11 +14,9 @@
             'sh'=>'ap-shanghai',
             'gz'=>'ap-guangzhou',
             'cd'=>'ap-chengdu',
-            'sgp'=>'ap-singapore',);
-
-function region_map($region) {
-    if (array_key_exists($region, regionmap)) {
-        return regionmap[$region];
+            'sgp'=>'ap-singapore');
+    if (array_key_exists($region, $regionmap)) {
+        return $regionmap[$region];
     }
     return $region;
 }
diff --git a/src/Qcloud/Cos/Tests/Test.php b/src/Qcloud/Cos/Tests/Test.php
index 55eb461b..550db17c 100644
--- a/src/Qcloud/Cos/Tests/Test.php
+++ b/src/Qcloud/Cos/Tests/Test.php
@@ -32,8 +32,8 @@ protected function tearDown() {
     /**********************************
      * TestBucket
      **********************************/
-
-    /*
+    
+     /*
      * put bucket,bucket已经存在
      * BucketAlreadyOwnedByYou
      * 409
@@ -47,6 +47,62 @@ public function testCreateExistingBucket()
         }
     }
 
+    /*
+     * put bucket, 创建所有region的bucket
+     * 409
+     */
+    public function testValidRegionBucket()
+    {
+        $regionlist = array('cn-east','ap-shanghai',
+        'cn-south','ap-guangzhou',
+        'cn-north','ap-beijing-1',
+        'cn-south-2','ap-guangzhou-2',
+        'cn-southwest','ap-chengdu',
+        'sg','ap-singapore',
+        'tj','ap-beijing-1',
+        'bj','ap-beijing',
+        'sh','ap-shanghai',
+        'gz','ap-guangzhou',
+        'cd','ap-chengdu',
+        'sgp','ap-singapore');
+        foreach ($regionlist as$region) {
+            try {
+
+                $this->cosClient = new Client(array('region' => $region,
+                    'credentials' => array(
+                        'appId' => getenv('COS_APPID'),
+                        'secretId' => getenv('COS_KEY'),
+                        'secretKey' => getenv('COS_SECRET'))));
+                $this->cosClient->createBucket(['Bucket' => $this->bucket]);
+            } catch (ServiceResponseException $e) {
+                $this->assertEquals([$e->getStatusCode()], [409]);
+            }
+        }
+    }
+
+    /*
+     * put bucket, 不合法的region名
+     * 409
+     */
+    public function testInvalidRegionBucket()
+    {
+        $regionlist = array('cn-east-2','ap-shanghai-3');
+        foreach ($regionlist as$region) {
+            try {
+                $this->cosClient = new Client(array('region' => $region,
+                    'credentials' => array(
+                        'appId' => getenv('COS_APPID'),
+                        'secretId' => getenv('COS_KEY'),
+                        'secretKey' => getenv('COS_SECRET'))));
+                $this->cosClient->createBucket(['Bucket' => $this->bucket]);
+            } catch (ServiceResponseException $e) {
+                $this->assertFalse(TRUE);
+            } catch (\GuzzleHttp\Exception\ConnectException $e) {
+                $this->assertTrue(TRUE);
+            }
+        }
+    }
+
     /*
      * put bucket,bucket名称非法
      * InvalidBucketName