diff --git a/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/Asns/X12AsnAppService.cs b/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/Asns/X12AsnAppService.cs
index e9b5bab..f7ea1be 100644
--- a/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/Asns/X12AsnAppService.cs
+++ b/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/Asns/X12AsnAppService.cs
@@ -49,7 +49,7 @@ namespace Win_in.Sfs.Scp.WebApi
         public X12AsnAppService(
             IX12AsnRepository repository
             , ITenantRepository tenantRepository
-    , IOptions<AsnOptions> options
+            , IOptions<AsnOptions> options
 
         ) : base(repository)
         {
diff --git a/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/PurchaseOrders/PurchaseOrderAppService.cs b/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/PurchaseOrders/PurchaseOrderAppService.cs
index 28a236d..d387a01 100644
--- a/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/PurchaseOrders/PurchaseOrderAppService.cs
+++ b/WebApiService/src/Win_in.Sfs.Scp.WebApi.Application/PurchaseOrders/PurchaseOrderAppService.cs
@@ -3,6 +3,7 @@ using Microsoft.AspNetCore.Mvc;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
+using System.Globalization;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Configuration;
 using Volo.Abp.Application.Dtos;
@@ -13,6 +14,7 @@ using Volo.Abp.Validation;
 using Win_in.Sfs.Scp.v1.Domain;
 using System.Security.Policy;
 using Volo.Abp.Data;
+using Microsoft.Extensions.Options;
 
 namespace Win_in.Sfs.Scp.WebApi
 {
@@ -31,6 +33,7 @@ namespace Win_in.Sfs.Scp.WebApi
         private readonly ITenantStore _tenantStore;
         private readonly ITenantRepository _tenantRepository;
         private readonly IDataFilter _dataFilter;
+        private readonly IOptions<AsnOptions> _options;
 
         public PurchaseOrderAppService(
             IPurchaseOrderRepository repository
@@ -40,6 +43,7 @@ namespace Win_in.Sfs.Scp.WebApi
             , ITenantStore tenantStore
             , ITenantRepository tenantRepository
             , IDataFilter dataFilter
+            , IOptions<AsnOptions> options
             ) : base(repository)
         {
             _purchaseOrderRepository = repository;
@@ -49,6 +53,7 @@ namespace Win_in.Sfs.Scp.WebApi
             _tenantStore = tenantStore;
             _tenantRepository = tenantRepository;
             _dataFilter = dataFilter;
+            _options = options;
         }
 
 
@@ -105,19 +110,25 @@ namespace Win_in.Sfs.Scp.WebApi
                 Validator.CheckSite(_tenantRepository, entity.Site);
                 Validator.CheckSite(_tenantRepository, entity.Company);
 
-                var tenant = await _tenantStore.FindAsync(entity.Site);
-                using (CurrentTenant.Change(tenant.Id, tenant.Name))
+                if (entity.PoNumber.StartsWith(_options.Value.ValidPoPre, true, CultureInfo.CurrentCulture))
                 {
-                    using (_dataFilter.Disable<IMultiTenant>())
+                    var tenant = await _tenantStore.FindAsync(entity.Site);
+                    using (CurrentTenant.Change(tenant.Id, tenant.Name))
                     {
+                        using (_dataFilter.Disable<IMultiTenant>())
+                        {
 
-                        Validator.CheckSupplierCode(_taVenderRepository, entity.Site, entity.SupplierCode);
+                            Validator.CheckSupplierCode(_taVenderRepository, entity.Site, entity.SupplierCode);
 
-
-                        await UpsertTbPoAndTbPoDetailAsync(entity, tenant.Id);
-                        await CurrentUnitOfWork.SaveChangesAsync();
+                            await UpsertTbPoAndTbPoDetailAsync(entity, tenant.Id);
+                            await CurrentUnitOfWork.SaveChangesAsync();
+                        }
                     }
                 }
+                else
+                {
+                    entity.ErrorMessage = $"'{entity.PoNumber}' is not start with '{_options.Value.ValidPoPre}',ignore.";
+                }
             }
             catch (Exception ex)
             {
diff --git a/WebApiService/src/Win_in.Sfs.Scp.WebApi.Domain.Shared/AsnOptions.cs b/WebApiService/src/Win_in.Sfs.Scp.WebApi.Domain.Shared/AsnOptions.cs
index 8e7b683..0eb5065 100644
--- a/WebApiService/src/Win_in.Sfs.Scp.WebApi.Domain.Shared/AsnOptions.cs
+++ b/WebApiService/src/Win_in.Sfs.Scp.WebApi.Domain.Shared/AsnOptions.cs
@@ -9,6 +9,7 @@ public class AsnOptions
     public int RetryTimes { get; set; } = 3;
     public int BatchSize { get; set; } = 10;
     public int MaxCount { get; set; } = 100;
+    public string ValidPoPre { get; set; } = "PO";
     public List<Site> Sites { get; set; } =new() ;
 
     public class Site
diff --git a/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/Win_in.Sfs.Scp.WebApi.HttpApi.Host.csproj b/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/Win_in.Sfs.Scp.WebApi.HttpApi.Host.csproj
index 244f957..ae6c2d1 100644
--- a/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/Win_in.Sfs.Scp.WebApi.HttpApi.Host.csproj
+++ b/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/Win_in.Sfs.Scp.WebApi.HttpApi.Host.csproj
@@ -7,8 +7,8 @@
     <RootNamespace>Win_in.Sfs.Scp.WebApi</RootNamespace>
     <PreserveCompilationReferences>true</PreserveCompilationReferences>
     <UserSecretsId>Win_in.Sfs.Scp.WebApi-4681b4fd-151f-4221-84a4-929d86723e4c</UserSecretsId>
-    <AssemblyVersion>1.22.0711.1</AssemblyVersion>
-    <FileVersion>1.22.0711.1</FileVersion>
+    <AssemblyVersion>1.22.0719.1</AssemblyVersion>
+    <FileVersion>1.22.0719.1</FileVersion>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/appsettings.json b/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/appsettings.json
index ad4d5e7..8c3ef5d 100644
--- a/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/appsettings.json
+++ b/WebApiService/src/Win_in.Sfs.Scp.WebApi.HttpApi.Host/appsettings.json
@@ -84,6 +84,7 @@
     "RetryTimes": 3,
     "BatchSize": 10,
     "MaxCount": 100,
+    "ValidPoPre": "PO",
     "Receiver": "IACNA_ID",
     "Sites": [
       {