diff --git a/SiNan.Business/GOIBusiness.cs b/SiNan.Business/GOIBusiness.cs
index 6b5ae62..0f86694 100644
--- a/SiNan.Business/GOIBusiness.cs
+++ b/SiNan.Business/GOIBusiness.cs
@@ -712,6 +712,7 @@ namespace SiNan.Business
                                                                              a.ProductId == request.Spu &&
                                                                              a.Date >= request.StartDate &&
                                                                              a.Date <= request.EndDate)
+                .OrderBy(a => a.Date)
                 .ToList(a => new PopularizeCostCurveStatisticsResponse()
                 {
                     Cost = a.Cost,
@@ -731,6 +732,7 @@ namespace SiNan.Business
                                                                              a.ProductId == request.Sku &&
                                                                              a.Date >= request.StartDate &&
                                                                              a.Date <= request.EndDate)
+                .OrderBy(a => a.Date)
                 .ToList(a => new PopularizeCostCurveStatisticsResponse()
                 {
                     Cost = a.Cost,