diff --git a/ucloud/core/client/_cfg.py b/ucloud/core/client/_cfg.py
index 4314822..353664b 100644
--- a/ucloud/core/client/_cfg.py
+++ b/ucloud/core/client/_cfg.py
@@ -6,7 +6,7 @@
 
 class ConfigSchema(schema.Schema):
     fields = {
-        "region": fields.Str(required=True),
+        "region": fields.Str(),
         "project_id": fields.Str(),
         "base_url": fields.Str(default="https://api.ucloud.cn"),
         "user_agent": fields.Str(),
@@ -47,7 +47,7 @@ class Config(object):
 
     def __init__(
         self,
-        region,
+        region=None,
         project_id=None,
         base_url="https://api.ucloud.cn",
         user_agent=None,
diff --git a/ucloud/core/client/_client.py b/ucloud/core/client/_client.py
index 236b68d..7456551 100644
--- a/ucloud/core/client/_client.py
+++ b/ucloud/core/client/_client.py
@@ -116,4 +116,6 @@ def _build_user_agent(self):
         return user_agent
 
     def __repr__(self):
-        return '<{}("{}")>'.format(self.__class__.__name__, self.config.region)
+        return '<{}(region="{}")>'.format(
+            self.__class__.__name__, self.config.region
+        )
diff --git a/ucloud/core/utils/compat.py b/ucloud/core/utils/compat.py
index 443799e..33e9dbc 100644
--- a/ucloud/core/utils/compat.py
+++ b/ucloud/core/utils/compat.py
@@ -10,6 +10,6 @@
 else:
     import types
 
-    str = unicode  # noqa: F821
+    str = unicode
     string_types = types.StringTypes
     from collections import Callable
diff --git a/ucloud/services/uphost/client.py b/ucloud/services/uphost/client.py
index 9a93e98..20358e9 100644
--- a/ucloud/services/uphost/client.py
+++ b/ucloud/services/uphost/client.py
@@ -65,6 +65,13 @@ def describe_phost(self, req=None, **kwargs):
         
         **Response Model**
         
+        **PHostCPUSet** 
+        
+        - **CoreCount** (int) - CPU核数
+        - **Count** (int) - CPU个数
+        - **Frequence** (float) - CPU主频
+        - **Model** (str) - CPU型号
+
         **PHostDiskSet** 
         
         - **Count** (int) - 磁盘数量
@@ -73,13 +80,6 @@ def describe_phost(self, req=None, **kwargs):
         - **Space** (int) - 单盘大小，单位GB
         - **Type** (str) - 磁盘属性
 
-        **PHostCPUSet** 
-        
-        - **CoreCount** (int) - CPU核数
-        - **Count** (int) - CPU个数
-        - **Frequence** (float) - CPU主频
-        - **Model** (str) - CPU型号
-
         **PHostIPSet** 
         
         - **Bandwidth** (int) - IP对应带宽，单位Mb，内网IP不显示带宽信息
@@ -93,7 +93,7 @@ def describe_phost(self, req=None, **kwargs):
         **PHostSet** 
         
         - **AutoRenew** (str) - 自动续费
-        - **CPUSet** (list) - 见 **PHostCPUSet** 模型定义
+        - **CPUSet** (dict) - 见 **PHostCPUSet** 模型定义
         - **ChargeType** (str) - 计费模式，枚举值为： Year，按年付费； Month，按月付费； Dynamic，按需付费（需开启权限）； Trial，试用（需开启权限）默认为月付
         - **Cluster** (str) - 网络环境。枚举值：千兆：1G ，万兆：10G
         - **Components** (str) - 组件信息（暂不支持）
diff --git a/ucloud/services/uphost/schemas/models.py b/ucloud/services/uphost/schemas/models.py
index 5a5c191..a608c10 100644
--- a/ucloud/services/uphost/schemas/models.py
+++ b/ucloud/services/uphost/schemas/models.py
@@ -4,15 +4,18 @@
 from ucloud.core.typesystem import schema, fields
 
 
-class PHostCPUSetSchema(schema.ResponseSchema):
-    """ PHostCPUSet - DescribePHost
+class PHostIPSetSchema(schema.ResponseSchema):
+    """ PHostIPSet - DescribePHost
     """
 
     fields = {
-        "CoreCount": fields.Int(required=False, load_from="CoreCount"),
-        "Count": fields.Int(required=False, load_from="Count"),
-        "Frequence": fields.Float(required=False, load_from="Frequence"),
-        "Model": fields.Str(required=False, load_from="Model"),
+        "Bandwidth": fields.Int(required=False, load_from="Bandwidth"),
+        "IPAddr": fields.Str(required=False, load_from="IPAddr"),
+        "IPId": fields.Str(required=False, load_from="IPId"),
+        "MACAddr": fields.Str(required=False, load_from="MACAddr"),
+        "OperatorName": fields.Str(required=False, load_from="OperatorName"),
+        "SubnetId": fields.Str(required=False, load_from="SubnetId"),
+        "VPCId": fields.Str(required=False, load_from="VPCId"),
     }
 
 
@@ -29,18 +32,15 @@ class PHostDiskSetSchema(schema.ResponseSchema):
     }
 
 
-class PHostIPSetSchema(schema.ResponseSchema):
-    """ PHostIPSet - DescribePHost
+class PHostCPUSetSchema(schema.ResponseSchema):
+    """ PHostCPUSet - DescribePHost
     """
 
     fields = {
-        "Bandwidth": fields.Int(required=False, load_from="Bandwidth"),
-        "IPAddr": fields.Str(required=False, load_from="IPAddr"),
-        "IPId": fields.Str(required=False, load_from="IPId"),
-        "MACAddr": fields.Str(required=False, load_from="MACAddr"),
-        "OperatorName": fields.Str(required=False, load_from="OperatorName"),
-        "SubnetId": fields.Str(required=False, load_from="SubnetId"),
-        "VPCId": fields.Str(required=False, load_from="VPCId"),
+        "CoreCount": fields.Int(required=False, load_from="CoreCount"),
+        "Count": fields.Int(required=False, load_from="Count"),
+        "Frequence": fields.Float(required=False, load_from="Frequence"),
+        "Model": fields.Str(required=False, load_from="Model"),
     }
 
 
@@ -50,7 +50,7 @@ class PHostSetSchema(schema.ResponseSchema):
 
     fields = {
         "AutoRenew": fields.Str(required=False, load_from="AutoRenew"),
-        "CPUSet": fields.List(PHostCPUSetSchema()),
+        "CPUSet": PHostCPUSetSchema(),
         "ChargeType": fields.Str(required=False, load_from="ChargeType"),
         "Cluster": fields.Str(required=False, load_from="Cluster"),
         "Components": fields.Str(required=False, load_from="Components"),
diff --git a/ucloud/version.py b/ucloud/version.py
index 073c188..a486b39 100644
--- a/ucloud/version.py
+++ b/ucloud/version.py
@@ -1,3 +1,3 @@
 # -*- coding: utf-8 -*-
 
-version = "0.5.0"
+version = "0.5.1"