diff --git a/api_line_products.go b/api_line_products.go
index 3ffab71..6636671 100644
--- a/api_line_products.go
+++ b/api_line_products.go
@@ -77,7 +77,7 @@ func ApiPurchase(event *linebot.Event) {
 	for i, salse := range salses {
 		columns[i] = linebot.NewCarouselColumn(
 			salse.Img, salse.Name, salse.Brief,
-			linebot.NewPostbackAction("讓我幫你", "sales="+salse.Name, "讓我幫你", ""),
+			linebot.NewPostbackAction("讓我幫你", "sales="+salse.Name+"&"+event.Postback.Data, "讓我幫你", ""),
 		)
 	}
 	template := linebot.NewCarouselTemplate(columns...)
diff --git a/api_line_sales.go b/api_line_sales.go
index dca9de5..02bd50a 100644
--- a/api_line_sales.go
+++ b/api_line_sales.go
@@ -8,8 +8,9 @@ import (
 )
 
 func ApiSelectSales(event *linebot.Event) {
-	data := event.Postback.Data
-	data = strings.TrimPrefix(data, "sales=")
+	args := strings.Split(event.Postback.Data, "&")
+	data := strings.TrimPrefix(args[0], "sales=")
+	pname := strings.TrimPrefix(args[1], "purchase=")
 
 	sales := &Sales{}
 	DB.First(sales, "name = ?", data)
@@ -20,6 +21,18 @@ func ApiSelectSales(event *linebot.Event) {
 	msg := linebot.NewFlexMessage("很高興為您服務!", tmp)
 	sticker := linebot.NewStickerMessage("1070", "17852")
 	SendMessage(event.ReplyToken, event.Source.UserID, msg, sticker)
+
+	prod := &Product{}
+	DB.First(prod, "name = ?", pname)
+	go func() {
+		// sales called and start proccess
+		SendMessage("", event.Source.UserID)
+
+		// proccessing
+
+		//proccess complete
+	}()
+
 }
 
 var greet string = `