diff --git a/bce/config.go b/bce/config.go
index b7475d10..5bf491ff 100644
--- a/bce/config.go
+++ b/bce/config.go
@@ -26,7 +26,7 @@ import (
 
 // Constants and default values for the package bce
 const (
-	SDK_VERSION                          = "0.9.96"
+	SDK_VERSION                          = "0.9.97"
 	URI_PREFIX                           = "/" // now support uri without prefix "v1" so just set root path
 	DEFAULT_DOMAIN                       = "baidubce.com"
 	DEFAULT_PROTOCOL                     = "http"
diff --git a/doc/ENIC.md b/doc/ENIC.md
index 7b4f1ac1..0531cc1b 100644
--- a/doc/ENIC.md
+++ b/doc/ENIC.md
@@ -444,7 +444,21 @@ if err != nil {
 }
 fmt.Println("eenic update security group success")
 ```
+## ENIC查询配额
 
+```go
+args := &client.EniQuoteArgs{
+        EniId: "eniId",
+        ClientToken: getClientToken(),
+        InstanceId: "instanceId"
+}
+err := client.GetEniQuota(args)
+if err != nil {
+    fmt.Printf("enic get quota info error: %+v\n", err)
+    return
+}
+fmt.Println("enic get quota info success")
+```
 
 
 # 错误处理
diff --git a/doc/RDS.md b/doc/RDS.md
index bf9d1306..d0c8ada7 100644
--- a/doc/RDS.md
+++ b/doc/RDS.md
@@ -844,7 +844,8 @@ fmt.Printf("update parameter success\n")
 >
 > - 在修改配置参数时需要通过获取参数列表接口获取最新的Etag。
 
-# 其它
+
+# 备份管理
 
 ## 获取备份列表
 
@@ -865,6 +866,41 @@ fmt.Printf("get backup list success\n")
 >
 > - 请求参数 marker 和 maxKeys 不是必须的。
 
+## 获取备份详情
+
+使用以下代码可以获取一个实例备份的详情信息。
+```go
+// import "github.com/baidubce/bce-sdk-go/services/rds"
+_, err := client.GetBackupDetail(instanceId, backupId)
+if err != nil {
+    fmt.Printf("get backup detail error: %+v\n", err)
+    return
+}
+fmt.Printf("get backup detail success\n")
+```
+
+## 更新备份策略
+
+使用以下代码可以更新一个实例的备份策略。
+```go
+// import "github.com/baidubce/bce-sdk-go/services/rds"
+args := &rds.ModifyBackupPolicyArgs{
+    BackupDays: "1,3",
+    BackupTime: "10:00:00Z",
+    Persistent: true,
+    ExpireInDays: 20,
+}
+err := client.ModifyBackupPolicy(instanceId, args)
+if err != nil {
+    fmt.Printf("modify backup policy error: %+v\n", err)
+    return
+}
+fmt.Printf("modify backup policy success\n")
+```
+
+
+# 其它
+
 ## 获取可用区列表
 
 使用以下代码可以获取可用区列表。
diff --git a/services/rds/model.go b/services/rds/model.go
index d44e0ade..f8723e17 100644
--- a/services/rds/model.go
+++ b/services/rds/model.go
@@ -215,6 +215,13 @@ type ModifyPublicAccessArgs struct {
 	PublicAccess bool `json:"publicAccess"`
 }
 
+type ModifyBackupPolicyArgs struct {
+	BackupDays   string `json:"backupDays"`
+	BackupTime   string `json:"backupTime"`
+	Persistent   bool   `json:"persistent"`
+	ExpireInDays int    `json:"expireInDays"`
+}
+
 type GetBackupListArgs struct {
 	Marker  string
 	MaxKeys int
@@ -227,6 +234,8 @@ type Snapshot struct {
 	SnapshotStatus      string `json:"backupStatus"`
 	SnapshotStartTime   string `json:"backupStartTime"`
 	SnapshotEndTime     string `json:"backupEndTime"`
+	DownloadUrl         string `json:"downloadUrl"`
+	DownloadExpires     string `json:"downloadExpires"`
 }
 
 type GetBackupListResult struct {
diff --git a/services/rds/rds.go b/services/rds/rds.go
index 22dee6d0..4cf1393b 100644
--- a/services/rds/rds.go
+++ b/services/rds/rds.go
@@ -387,6 +387,25 @@ func (c *Client) ModifyPublicAccess(instanceId string, args *ModifyPublicAccessA
 		Do()
 }
 
+// ModifyBackupPolicy - modify backup policy
+//
+// PARAMS:
+//     - cli: the client agent which can perform sending request
+//     - instanceId: id of the instance
+//     - args: the arguments to modify public access
+// RETURNS:
+//     - error: nil if success otherwise the specific error
+func (c *Client) ModifyBackupPolicy(instanceId string, args *ModifyBackupPolicyArgs) error {
+
+	return bce.NewRequestBuilder(c).
+		WithMethod(http.PUT).
+		WithURL(getRdsUriWithInstanceId(instanceId)).
+		WithQueryParam("modifyBackupPolicy", "").
+		WithHeader(http.CONTENT_TYPE, bce.DEFAULT_CONTENT_TYPE).
+		WithBody(args).
+		Do()
+}
+
 // GetBackupList - get backup list of the instance
 //
 // PARAMS:
@@ -417,6 +436,26 @@ func (c *Client) GetBackupList(instanceId string, args *GetBackupListArgs) (*Get
 	return result, err
 }
 
+// GetBackupDetail - get backup detail of the instance's backup
+//
+// PARAMS:
+//     - cli: the client agent which can perform sending request
+//     - instanceId: id of the instance
+//     - backupId: id of the backup
+// RETURNS:
+//     - *Snapshot: result of the backup detail
+//     - error: nil if success otherwise the specific error
+func (c *Client) GetBackupDetail(instanceId string, backupId string) (*Snapshot, error) {
+	result := &Snapshot{}
+	err := bce.NewRequestBuilder(c).
+		WithMethod(http.GET).
+		WithURL(getRdsUriWithInstanceId(instanceId) + "/backup/" + backupId).
+		WithResult(result).
+		Do()
+
+	return result, err
+}
+
 // GetZoneList - list all zone
 //
 // PARAMS: