diff --git a/app/admin/apis/purchasemanage/purchase.go b/app/admin/apis/purchasemanage/purchase.go
index af450dd..6af9f37 100644
--- a/app/admin/apis/purchasemanage/purchase.go
+++ b/app/admin/apis/purchasemanage/purchase.go
@@ -285,6 +285,7 @@ func ErpPurchaseDetail(c *gin.Context) {
 		v.EffectiveCount = nCount // 有效数量
 		v.ErpCategoryID = erpCommodity.ErpCategoryId
 		v.ErpCategoryName = erpCommodity.ErpCategoryName
+		v.Price = math.Round(v.Price*1000) / 1000
 
 		commodityList = append(commodityList, v)
 	}
diff --git a/app/admin/models/commodity.go b/app/admin/models/commodity.go
index f1a848b..943b28c 100644
--- a/app/admin/models/commodity.go
+++ b/app/admin/models/commodity.go
@@ -509,6 +509,10 @@ func (m *ErpCommodityListReq) List() (*ErpCommodityListResp, error) {
 
 		// 计算分页所需的切片索引
 		startIndex := page * m.PageSize
+		if (len(commodities)/m.PageSize + 1) < startIndex {
+			startIndex = 0
+			page = 0
+		}
 		endIndex := (page + 1) * m.PageSize
 		if endIndex > len(commodities) {
 			endIndex = len(commodities)
diff --git a/app/admin/models/purchase.go b/app/admin/models/purchase.go
index 2dd697b..dbb9d2b 100644
--- a/app/admin/models/purchase.go
+++ b/app/admin/models/purchase.go
@@ -782,29 +782,63 @@ func (m *ErpPurchaseOrder) IdInit() error {
 	return nil
 }
 
-// GetPurchaseInventorySn 生成入库编号
+//// GetPurchaseInventorySn 生成入库编号  有重复的情况
+//func GetPurchaseInventorySn() string {
+//	count := 0
+//	for {
+//		if count > 5 {
+//			return ""
+//		}
+//		nowTime := time.Now()
+//		sn := nowTime.Format("060102")
+//		sn += fmt.Sprintf("%d", nowTime.Unix()%100)
+//		rand.Seed(nowTime.UnixNano())
+//		sn += fmt.Sprintf("%d", rand.Int31n(100))
+//		exist, err := QueryRecordExist(fmt.Sprintf("SELECT * FROM erp_purchase_inventory WHERE serial_number='%s'", sn))
+//		if err != nil {
+//			logger.Error("sn err:", logger.Field("err", err))
+//			count++
+//			continue
+//		}
+//		if err == nil && !exist {
+//			return sn
+//		}
+//		return ""
+//	}
+//}
+
+var mu sync.Mutex
+
+// GetPurchaseInventorySn generates a unique inventory serial number
 func GetPurchaseInventorySn() string {
-	count := 0
-	for {
-		if count > 5 {
-			return ""
-		}
+	const maxRetries = 5
+
+	mu.Lock()
+	defer mu.Unlock()
+
+	for retryCount := 0; retryCount < maxRetries; retryCount++ {
 		nowTime := time.Now()
-		sn := nowTime.Format("060102")
-		sn += fmt.Sprintf("%d", nowTime.Unix()%100)
-		rand.Seed(nowTime.UnixNano())
-		sn += fmt.Sprintf("%d", rand.Int31n(100))
+		// 使用日期格式精确到天
+		datePart := nowTime.Format("060102") // 格式为 YYMMDD
+		// 生成10位随机数
+		rand.Seed(nowTime.UnixNano() + int64(retryCount)) // 为了确保每次生成不同的随机数
+		randomNum := rand.Int63n(1e10)                    // 10位随机数，范围从0到9999999999
+		randomPart := fmt.Sprintf("%010d", randomNum)     // 确保随机数是10位的，前面补零
+
+		// 拼接日期部分和随机数部分
+		sn := fmt.Sprintf("%s%s", datePart, randomPart)
+
 		exist, err := QueryRecordExist(fmt.Sprintf("SELECT * FROM erp_purchase_inventory WHERE serial_number='%s'", sn))
 		if err != nil {
 			logger.Error("sn err:", logger.Field("err", err))
-			count++
 			continue
 		}
-		if err == nil && !exist {
+		if !exist {
 			return sn
 		}
-		return ""
 	}
+
+	return "" // 返回空字符串，如果在最大重试次数后仍未找到唯一编号
 }
 
 // CheckCreateErpPurchaseOrderParam 新增采购订单-检查参数
@@ -1296,8 +1330,8 @@ func InventoryErpPurchaseUpdateStock(gdb *gorm.DB, list []ErpPurchaseInventory,
 			ErpCategoryName:       commodityInfo.ErpCategoryName,
 			ErpSupplierId:         purchaseOrder.ErpSupplierId,
 			ErpSupplierName:       purchaseOrder.ErpSupplierName,
-			StaffCostPrice:        tools.RoundToTwoDecimalPlaces(v.EmployeePrice - v.ImplementationPrice),
-			WholesalePrice:        tools.RoundToTwoDecimalPlaces(v.ImplementationPrice),
+			StaffCostPrice:        tools.RoundToThreeDecimalPlaces(v.EmployeePrice - v.ImplementationPrice),
+			WholesalePrice:        tools.RoundToThreeDecimalPlaces(v.ImplementationPrice),
 			State:                 InStock,
 			StorageType:           PurchaseInventory, // 采购入库
 			FirstStockTime:        nowTime,
@@ -5740,6 +5774,9 @@ func CancelAuditUpdateStock(begin *gorm.DB, req ErpPurchaseOrder) error {
 		//	Inventories:        inventoryList,
 		//}
 
+		// 赋值采购退货单号
+		purchaseOrder.RejectedSerialNumber = purchaseOrder.SerialNumber
+
 		// 按照采购退货更新库存
 		err = InventoryErpPurchaseUpdateRejectStock(begin, inventoryList, purchaseOrder)
 		if err != nil {
diff --git a/tools/utils.go b/tools/utils.go
index dc7fa11..dc8de87 100644
--- a/tools/utils.go
+++ b/tools/utils.go
@@ -116,6 +116,11 @@ func RoundToTwoDecimalPlaces(num float64) float64 {
 	return math.Round(num*100) / 100
 }
 
+// RoundToThreeDecimalPlaces 将float64类型四舍五入保留3位小数
+func RoundToThreeDecimalPlaces(num float64) float64 {
+	return math.Round(num*1000) / 1000
+}
+
 // Uint32SliceContains 检查 uint32 切片中是否包含特定的值
 func Uint32SliceContains(slice []uint32, val uint32) bool {
 	for _, item := range slice {