fix

AutoTurnOver/Controllers/ReportInvestReturnController.cs

@@ -69,8 +69,8 @@ namespace AutoTurnOver.Controllers
                 row["过去7天销量"] = itemData.sales_day_7;
                 row["出单天数 (总)"] = itemData.order_days;
                 row["出单天数 (过去30天)"] = itemData.consume_days_30;
-                row["首次出单日期"] = itemData.first_order_date == null ? "" : itemData.first_order_date.Value.ToString("yyyy-MM-dd");
-                row["最后出单日期"] = itemData.last_order_date == null ? "" : itemData.last_order_date.Value.ToString("yyyy-MM-dd");
+                row["首次出单日期"] = itemData.first_order_date == null ? "" : itemData.first_order_date.Value.ToString("`yyyy-MM-dd");
+                row["最后出单日期"] = itemData.last_order_date == null ? "" : itemData.last_order_date.Value.ToString("`yyyy-MM-dd");
                 row["30天利润 CNY"] = itemData.profit_30_forecast;
                 row["可售天数"] = itemData.vendibility_days;
                 row["采购在途数量"] = itemData.quantity_purchase;