diff --git a/business/partner/purchase/mtwm/mtwm.go b/business/partner/purchase/mtwm/mtwm.go
index 1f6c280ff..4a82b7d0b 100644
--- a/business/partner/purchase/mtwm/mtwm.go
+++ b/business/partner/purchase/mtwm/mtwm.go
@@ -2,7 +2,6 @@ package mtwm
 
 import (
 	"fmt"
-	"math/rand"
 	"strings"
 	"sync"
 
@@ -185,20 +184,27 @@ func (p *PurchaseHandler) UploadImg(ctx *jxcontext.Context, imgURL string, imgDa
 	return imgHint, err
 }
 
+func getStoreIDFromList(storeIDs []string) (poiCode string) {
+	if len(storeIDs) > 0 {
+		poiCode = storeIDs[0]
+	}
+	return poiCode
+}
+
 func (p *PurchaseHandler) getUploadImgPoiCode() (poiCode string) {
 	var storeIDs []string
 	p.locker.RLock()
 	storeIDs = p.storeIDs
 	p.locker.RUnlock()
 	if len(storeIDs) > 0 {
-		return storeIDs[rand.Intn(len(storeIDs))]
+		return getStoreIDFromList(storeIDs)
 	}
 
 	p.locker.Lock()
 	storeIDs = p.storeIDs
 	if len(storeIDs) > 0 {
 		p.locker.Unlock()
-		return storeIDs[rand.Intn(len(storeIDs))]
+		return getStoreIDFromList(storeIDs)
 	}
 
 	defer p.locker.Unlock()
@@ -206,7 +212,7 @@ func (p *PurchaseHandler) getUploadImgPoiCode() (poiCode string) {
 	if err == nil {
 		if len(storeIDs) > 0 {
 			p.storeIDs = storeIDs
-			poiCode = storeIDs[rand.Intn(len(storeIDs))]
+			poiCode = getStoreIDFromList(storeIDs)
 		} else {
 			// p.storeIDs = []string{""}
 		}