diff --git a/ci_media.go b/ci_media.go
index b9dfd90..c7bbd21 100644
--- a/ci_media.go
+++ b/ci_media.go
@@ -25,7 +25,7 @@ type Video struct {
 	Width         string `xml:"Width"`
 	Height        string `xml:"Height"`
 	Fps           string `xml:"Fps"`
-	Remove        string `xml:"Remove"`
+	Remove        string `xml:"Remove,omitempty"`
 	Profile       string `xml:"Profile"`
 	Bitrate       string `xml:"Bitrate"`
 	Crf           string `xml:"Crf"`
@@ -48,7 +48,7 @@ type Audio struct {
 	Samplerate string `xml:"Samplerate"`
 	Bitrate    string `xml:"Bitrate"`
 	Channels   string `xml:"Channels"`
-	Remove     string `xml:"Remove"`
+	Remove     string `xml:"Remove,omitempty"`
 }
 
 type TransConfig struct {
@@ -97,13 +97,25 @@ type Watermark struct {
 	Image     *Image `xml:"Image,omitempty"`
 	Text      *Text  `xml:"Text,omitempty"`
 }
-
+type ConcatFragment struct {
+	Url       string `xml:"Url,omitempty"`
+	StartTime string `xml:"StartTime,omitempty"`
+	EndTime   string `xml:"EndTime,omitempty"`
+}
+type ConcatTemplate struct {
+	ConcatFragment []ConcatFragment `xml:"ConcatFragment,omitempty"`
+	Audio          *Audio           `xml:"Audio,omitempty"`
+	Video          *Video           `xml:"Video,omitempty"`
+	Container      *Container       `xml:"Container,omitempty"`
+	Index          string           `xml:"Index,omitempty"`
+}
 type MediaProcessJobOperation struct {
-	Output              *JobOutput `xml:"Output,omitempty"`
-	Transcode           *Transcode `xml:"Transcode,omitempty"`
-	Watermark           *Watermark `xml:"Watermark,omitempty"`
-	TemplateId          string     `xml:"TemplateId,omitempty"`
-	WatermarkTemplateId []string   `xml:"WatermarkTemplateId,omitempty"`
+	Output              *JobOutput      `xml:"Output,omitempty"`
+	Transcode           *Transcode      `xml:"Transcode,omitempty"`
+	Watermark           *Watermark      `xml:"Watermark,omitempty"`
+	TemplateId          string          `xml:"TemplateId,omitempty"`
+	WatermarkTemplateId []string        `xml:"WatermarkTemplateId,omitempty"`
+	ConcatTemplate      *ConcatTemplate `xml:"ConcatTemplate,omitempty"`
 }
 
 type CreateMediaJobsOptions struct {
diff --git a/cos.go b/cos.go
index 14abf7a..8a9e820 100644
--- a/cos.go
+++ b/cos.go
@@ -22,7 +22,7 @@ import (
 
 const (
 	// Version current go sdk version
-	Version               = "0.7.30"
+	Version               = "0.7.31"
 	userAgent             = "cos-go-sdk-v5/" + Version
 	contentTypeXML        = "application/xml"
 	defaultServiceBaseURL = "http://service.cos.myqcloud.com"
diff --git a/example/CI/media_process/media_process.go b/example/CI/media_process/media_process.go
index c822a02..5fbd82c 100644
--- a/example/CI/media_process/media_process.go
+++ b/example/CI/media_process/media_process.go
@@ -30,7 +30,78 @@ func log_status(err error) {
 	}
 }
 
-func main() {
+func InvokeConcatTask() {
+	u, _ := url.Parse("https://wwj-bj-1253960454.cos.ap-beijing.myqcloud.com")
+	cu, _ := url.Parse("https://wwj-bj-1253960454.ci.ap-beijing.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u, CIURL: cu}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader: true,
+				// Notice when put a large file and set need the request body, might happend out of memory error.
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+	// DescribeMediaProcessQueues
+	DescribeQueueOpt := &cos.DescribeMediaProcessQueuesOptions{
+		QueueIds:   "",
+		PageNumber: 1,
+		PageSize:   2,
+	}
+	DescribeQueueRes, _, err := c.CI.DescribeMediaProcessQueues(context.Background(), DescribeQueueOpt)
+	log_status(err)
+	fmt.Printf("%+v\n", DescribeQueueRes)
+	// CreateMediaJobs
+	concatFragment := make([]cos.ConcatFragment, 0)
+	concatFragment = append(concatFragment, cos.ConcatFragment{
+		Url: "https://wwj-bj-1253960454.cos.ap-beijing.myqcloud.com/input/117374C.mp4",
+		StartTime: "0",
+		EndTime: "10",
+	})
+	concatFragment = append(concatFragment, cos.ConcatFragment{
+		Url: "https://wwj-bj-1253960454.cos.ap-beijing.myqcloud.com/input/117374C.mp4",
+		StartTime: "20",
+		EndTime: "30",
+	})
+	createJobOpt := &cos.CreateMediaJobsOptions{
+		Tag: "Concat",
+		Operation: &cos.MediaProcessJobOperation{
+			Output: &cos.JobOutput{
+				Region: "ap-beijing",
+				Object: "output/go_117374C.mp4",
+				Bucket: "wwj-bj-1253960454",
+			},
+			ConcatTemplate: &cos.ConcatTemplate{
+				Container: &cos.Container{
+					Format: "mp4",
+				},
+				Video: &cos.Video{
+					Codec: "H.264",
+				},
+				Audio: &cos.Audio{
+					Codec: "AAC",
+				},
+				ConcatFragment:concatFragment,
+			},
+		},
+		QueueId: DescribeQueueRes.QueueList[0].QueueId,
+	}
+	createJobRes, _, err := c.CI.CreateMediaJobs(context.Background(), createJobOpt)
+	log_status(err)
+	fmt.Printf("%+v\n", createJobRes.JobsDetail)
+
+	// DescribeMediaJobs
+	DescribeJobRes, _, err := c.CI.DescribeMediaJob(context.Background(), createJobRes.JobsDetail.JobId)
+	log_status(err)
+	fmt.Printf("%+v\n", DescribeJobRes.JobsDetail)
+}
+
+func InvokeTranscodeTask() {
 	u, _ := url.Parse("https://wwj-cq-1253960454.cos.ap-chongqing.myqcloud.com")
 	cu, _ := url.Parse("https://wwj-cq-1253960454.ci.ap-chongqing.myqcloud.com")
 	b := &cos.BaseURL{BucketURL: u, CIURL: cu}
@@ -95,3 +166,8 @@ func main() {
 	log_status(err)
 	fmt.Printf("%+v\n", DescribeJobRes.JobsDetail)
 }
+
+func main() {
+	InvokeConcatTask()
+	//InvokeTranscodeTask()
+}