diff --git a/api.go b/api.go
index 761f99f..899b4d9 100644
--- a/api.go
+++ b/api.go
@@ -156,22 +156,22 @@ func ReLoadConfigAPIHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 type PublishExtraInfo struct {
-	MerkleRoot   string `json:"mklroot"`
-	Mode         string `json:"mode"`
-	SubMode      string `json:"sub_mode"`
-	UnitPrice    int64  `json:"uprice"`
-	Description  string `json:"description"`
-	ContractAddr string `json:"contract_addr"`
+	MerkleRoot   string   `json:"mklroot"`
+	Mode         string   `json:"mode"`
+	SubMode      []string `json:"sub_mode"`
+	UnitPrice    int64    `json:"uprice"`
+	Description  string   `json:"description"`
+	ContractAddr string   `json:"contract_addr"`
 }
 
 type InitPublishConfig struct {
-	Mode        string `json:"mode"`
-	SubMode     string `json:"sub_mode"`
-	Column      string `json:"column"`
-	Keys        []int  `json:"keys"`
-	UnitPrice   int64  `json:"unit_price"`
-	Description string `json:"description"`
-	FilePath    string `json:"file_path"`
+	Mode        string   `json:"mode"`
+	SubMode     []string `json:"sub_mode"`
+	Column      string   `json:"column"`
+	Keys        []int    `json:"keys"`
+	UnitPrice   int64    `json:"unit_price"`
+	Description string   `json:"description"`
+	FilePath    string   `json:"file_path"`
 }
 
 //InitPublishDataAPIHandler is a api handler for seller to initializing data for publishing.
@@ -202,12 +202,29 @@ func InitPublishDataAPIHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if (config.Mode == "plain" && (config.SubMode == "table1" || config.SubMode == "table2") && config.Column != "") ||
-		(config.Mode == "table" && (config.SubMode == "table1" || config.SubMode == "table2" || config.SubMode == "vrf") && len(config.Keys) != 0) {
-		Log.Warnf("parameters are incomplete. mode=%v, subMode=%v, column=%v, keys=%v", config.Mode, config.SubMode, config.Column, config.Keys)
+	if len(config.SubMode) == 0 {
+		Log.Warnf("parameters are incomplete, submode is nil. mode=%v, subMode=%v, column=%v, keys=%v", config.Mode, config.SubMode, config.Column, config.Keys)
 		fmt.Fprintf(w, RESPONSE_INCOMPLETE_PARAM)
 		return
 	}
+
+	if config.Mode == TRANSACTION_MODE_PLAIN_POD {
+		for _, s := range config.SubMode {
+			if s != TRANSACTION_SUB_MODE_BATCH1 && s != TRANSACTION_SUB_MODE_BATCH2 {
+				Log.Warnf("parameters are incomplete. mode=%v, subMode=%v, column=%v, keys=%v", config.Mode, config.SubMode, config.Column, config.Keys)
+				fmt.Fprintf(w, RESPONSE_INCOMPLETE_PARAM)
+				return
+			}
+		}
+	} else if config.Mode == TRANSACTION_MODE_TABLE_POD {
+		for _, s := range config.SubMode {
+			if s != TRANSACTION_SUB_MODE_BATCH1 && s != TRANSACTION_SUB_MODE_BATCH2 && s != TRANSACTION_SUB_MODE_VRF {
+				Log.Warnf("parameters are incomplete. mode=%v, subMode=%v, column=%v, keys=%v", config.Mode, config.SubMode, config.Column, config.Keys)
+				fmt.Fprintf(w, RESPONSE_INCOMPLETE_PARAM)
+				return
+			}
+		}
+	}
 	Log.Debugf("parameter verified. mode=%v, subMode=%v, column=%v, keys=%v", config.Mode, config.SubMode, config.Column, config.Keys)
 	plog.Detail = fmt.Sprintf("mode=%v, subMode=%v, column=%v, keys=%v", config.Mode, config.SubMode, config.Column, config.Keys)
 
@@ -621,7 +638,7 @@ func BuyerPurchaseDataAPIHandler(w http.ResponseWriter, r *http.Request) {
 	plog.Detail = fmt.Sprintf("%v, merkle root=%v,", plog.Detail, bulletin.SigmaMKLRoot)
 
 	Log.Debugf("step0: prepare for transaction...")
-	var params = BuyerConnParam{data.SellerIP, data.SellerAddr, bulletin.Mode, "", data.OT, data.UnitPrice, "", bulletin.SigmaMKLRoot}
+	var params = BuyerConnParam{data.SellerIP, data.SellerAddr, bulletin.Mode, data.SubMode, data.OT, data.UnitPrice, "", bulletin.SigmaMKLRoot}
 	node, conn, params, err := preBuyerConn(params, ETHKey, Log)
 	if err != nil {
 		Log.Warnf("failed to prepare net for transaction. err=%v", err)
diff --git a/buyer_tx.go b/buyer_tx.go
index 3ecfe30..fe7dbb9 100644
--- a/buyer_tx.go
+++ b/buyer_tx.go
@@ -608,7 +608,7 @@ func buyerTxForPB2(node *pod_net.Node, key *keystore.Key, tx BuyerTransaction, d
 		tx.Status = TRANSACTION_STATUS_VERIFY_FAILED
 		return fmt.Sprintf(RESPONSE_TRANSACTION_FAILED, "step1: failed to purchase data.")
 	} else {
-		Log.Warnf("[%v]step6: start decrypt data...", tx.SessionID)
+		Log.Debugf("[%v]step6: start decrypt data...", tx.SessionID)
 		rs = tx.PlainBatch2.buyerDecrypt(outputFile, Log)
 		if !rs {
 			tx.Status = TRANSACTION_STATUS_DECRYPT_FAILED
diff --git a/init.go b/init.go
index c4f1b13..f7ab2f7 100644
--- a/init.go
+++ b/init.go
@@ -47,7 +47,7 @@ type RequestData struct {
 	PubPath      string `json:"pub_path"`
 	BulletinFile string `json:"bulletin_file"`
 	// Mode            string    `json:"mode"`
-	// SubMode         string    `json:"sub_mode"`
+	SubMode         string    `json:"sub_mode"`
 	OT              bool      `json:"ot"`
 	Demands         []Demand  `json:"demands"`
 	Phantoms        []Phantom `json:"phantoms"`
diff --git a/seller_tx.go b/seller_tx.go
index 8375804..a5a5e3b 100644
--- a/seller_tx.go
+++ b/seller_tx.go
@@ -70,9 +70,22 @@ func preSellerTx(mklroot string, re requestExtra, Log ILogger) (SellerConnParam,
 	}
 	params.UnitPrice = re.Price
 	re.Mode = bulletin.Mode
-	re.SubMode = extra.SubMode
+	var subMode string
+	if len(extra.SubMode) == 0 {
+		return params, re, fmt.Errorf("no subMode")
+	}
+	for _, s := range extra.SubMode {
+		if re.SubMode == s && s != "" {
+			subMode = s
+			break
+		}
+	}
+	if subMode == "" {
+		subMode = extra.SubMode[0]
+	}
+	re.SubMode = subMode
 	params.Mode = bulletin.Mode
-	params.SubMode = extra.SubMode
+	params.SubMode = subMode
 	if params.SubMode == TRANSACTION_SUB_MODE_BATCH2 {
 		re.Ot = false
 	}