diff --git a/src/main/java/au/com/royalpay/payment/manage/mappers/system/ClientMapper.java b/src/main/java/au/com/royalpay/payment/manage/mappers/system/ClientMapper.java
index e39445f5a..3be51a159 100644
--- a/src/main/java/au/com/royalpay/payment/manage/mappers/system/ClientMapper.java
+++ b/src/main/java/au/com/royalpay/payment/manage/mappers/system/ClientMapper.java
@@ -72,7 +72,4 @@ public interface ClientMapper {
     List<String> listCityClientIds(@Param("city") String city, @Param("date") Date date);
 
     List<String> listClientByCleanDays(@Param("clean_days") int clean_days);
-
-    @AutoSql(type = SqlType.SELECT)
-    int getPartnercode(@Param("codes") String codes);
 }
diff --git a/src/main/java/au/com/royalpay/payment/manage/merchants/beans/ClientRegisterInfo.java b/src/main/java/au/com/royalpay/payment/manage/merchants/beans/ClientRegisterInfo.java
index 03d5d20f3..be305c8fc 100644
--- a/src/main/java/au/com/royalpay/payment/manage/merchants/beans/ClientRegisterInfo.java
+++ b/src/main/java/au/com/royalpay/payment/manage/merchants/beans/ClientRegisterInfo.java
@@ -13,7 +13,7 @@ import javax.validation.constraints.Pattern;
 public class ClientRegisterInfo {
     @JSONField(name = "client_moniker")
     @NotEmpty(message = "error.payment.valid.param_missing")
-    @Pattern(regexp = "^[a-zA-Z0-9]{6}$", message = "Parameter error(partner code):Only letters or numbers are allowed")
+    @Pattern(regexp = "^[a-zA-Z0-9]{4}$", message = "Parameter error(partner code):Only letters or numbers are allowed")
     private String clientMoniker;
     @NotEmpty(message = "error.payment.valid.param_missing")
     @JSONField(name = "company_name")
diff --git a/src/main/java/au/com/royalpay/payment/manage/merchants/core/ClientManager.java b/src/main/java/au/com/royalpay/payment/manage/merchants/core/ClientManager.java
index b3e06c72e..7f29c5718 100644
--- a/src/main/java/au/com/royalpay/payment/manage/merchants/core/ClientManager.java
+++ b/src/main/java/au/com/royalpay/payment/manage/merchants/core/ClientManager.java
@@ -264,6 +264,4 @@ public interface ClientManager {
     void validRefundPwd(JSONObject account, String pwd);
 
     void setWeekendDelay(int clientId, boolean delay);
-
-    String initMerchantCode();
 }
diff --git a/src/main/java/au/com/royalpay/payment/manage/merchants/core/impls/ClientManagerImpl.java b/src/main/java/au/com/royalpay/payment/manage/merchants/core/impls/ClientManagerImpl.java
index 504598dc0..a2814d7ee 100644
--- a/src/main/java/au/com/royalpay/payment/manage/merchants/core/impls/ClientManagerImpl.java
+++ b/src/main/java/au/com/royalpay/payment/manage/merchants/core/impls/ClientManagerImpl.java
@@ -2084,16 +2084,6 @@ public class ClientManagerImpl implements ClientManager, ManagerTodoNoticeProvid
         clientMapper.update(clientUpdate);
     }
 
-    @Override
-    public String initMerchantCode() {
-        String code = RandomStringUtils.randomAlphanumeric(6).toUpperCase();
-        if (clientMapper.getPartnercode(code) > 0) {
-            return initMerchantCode();
-        }
-        return code;
-    }
-
-
     @Override
     public void setClientQRCodePaySurCharge(String clientMoniker, boolean paySurcharge) {
         JSONObject client = getClientInfoByMoniker(clientMoniker);
diff --git a/src/main/java/au/com/royalpay/payment/manage/merchants/web/PartnerManageController.java b/src/main/java/au/com/royalpay/payment/manage/merchants/web/PartnerManageController.java
index 83c9a785c..f9d090a2c 100644
--- a/src/main/java/au/com/royalpay/payment/manage/merchants/web/PartnerManageController.java
+++ b/src/main/java/au/com/royalpay/payment/manage/merchants/web/PartnerManageController.java
@@ -482,8 +482,4 @@ public class PartnerManageController {
     public void localMerchantPermission(@PathVariable String clientMoniker, @RequestBody JSONObject pass, @ModelAttribute(CommonConsts.MANAGER_STATUS) JSONObject manager) {
         clientManager.switchPermission(manager, clientMoniker, "local_merchant", pass.getBooleanValue("allow"));
     }
-    @RequestMapping(value = "/init/merchant_code", method = RequestMethod.GET)
-    public String initMerchantCode() {
-        return clientManager.initMerchantCode();
-    }
 }
diff --git a/src/main/resources/au/com/royalpay/payment/manage/mappers/system/ClientMapper.xml b/src/main/resources/au/com/royalpay/payment/manage/mappers/system/ClientMapper.xml
index a1efe9f01..7995aa37b 100644
--- a/src/main/resources/au/com/royalpay/payment/manage/mappers/system/ClientMapper.xml
+++ b/src/main/resources/au/com/royalpay/payment/manage/mappers/system/ClientMapper.xml
@@ -272,7 +272,4 @@
     <select id="listClientByCleanDays" resultType="java.lang.String">
         SELECT client_id FROM sys_clients WHERE is_valid = 1 and  clean_days = #{clean_days}
     </select>
-    <select id="getPartnercode" resultType="int">
-        SELECT count(1) FROM sys_clients where client_moniker=#{codes};
-    </select>
 </mapper>
\ No newline at end of file
diff --git a/src/main/ui/static/payment/partner/partner-manage.js b/src/main/ui/static/payment/partner/partner-manage.js
index 92f6e47c2..a4fab9761 100644
--- a/src/main/ui/static/payment/partner/partner-manage.js
+++ b/src/main/ui/static/payment/partner/partner-manage.js
@@ -40,12 +40,7 @@ define(['angular', 'decimal', 'static/commons/commons', 'uiBootstrap', 'uiRouter
         }).state('partners.new', {
             url: '/new',
             templateUrl: '/static/payment/partner/templates/add_partner.html',
-            controller: 'addPartnerCtrl',
-            resolve: {
-                merchant_code: ['$http', function ($http) {
-                    return $http.get('/sys/partners/init/merchant_code');
-                }]
-            }
+            controller: 'addPartnerCtrl'
         }).state('partners.detail', {
             url: '/{clientMoniker}/detail',
             templateUrl: '/static/payment/partner/templates/partner_detail.html',
@@ -229,9 +224,6 @@ define(['angular', 'decimal', 'static/commons/commons', 'uiBootstrap', 'uiRouter
         }
         $scope.partner.company_phone_c = 61;
         $scope.partner.contact_phone_c = 61;
-        $http.get('/sys/partners/init/merchant_code').then(function (response) {
-            $scope.partner.client_moniker = response.data;
-        });
 
         function remove(arr, val) {
             if (angular.isArray(arr)) {
@@ -1249,10 +1241,6 @@ define(['angular', 'decimal', 'static/commons/commons', 'uiBootstrap', 'uiRouter
                 controller: 'partnerNewSubPartnerDialogCtrl',
                 size: 'lg',
                 resolve: {
-                    merchant_code: ['$http', function ($http) {
-                        return $http.get('/sys/partners/init/merchant_code');
-                    }],
-
                     clientMoniker: function () {
                         return $scope.partner.client_moniker;
                     }
@@ -1546,9 +1534,6 @@ define(['angular', 'decimal', 'static/commons/commons', 'uiBootstrap', 'uiRouter
     app.controller('partnerNewSubPartnerDialogCtrl', ['$rootScope', '$scope', '$http', '$state', 'Upload', 'commonDialog', 'timezone',
         'clientMoniker', 'industryMap', 'businessStructuresMap', 'stateMap', 'countryMap',
         function ($rootScope, $scope, $http, $state, Upload, commonDialog, timezone, clientMoniker, industryMap, businessStructuresMap, stateMap, countryMap) {
-            $http.get('/sys/partners/init/merchant_code').then(function (response) {
-                $scope.partner.client_moniker = response.data;
-            });
             if ($scope.partner_application) {
                 $scope.partner = angular.copy($scope.partner_application);
                 delete $rootScope.partner_application;
diff --git a/src/main/ui/static/payment/partner/templates/add_partner.html b/src/main/ui/static/payment/partner/templates/add_partner.html
index 5f3c3f649..eaeb79dd6 100644
--- a/src/main/ui/static/payment/partner/templates/add_partner.html
+++ b/src/main/ui/static/payment/partner/templates/add_partner.html
@@ -27,7 +27,8 @@
                                            ng-model="partner.client_moniker"
                                            type="text"
                                            name="client_moniker"
-                                           id="short-id-input" readonly>
+                                           id="short-id-input" required maxlength="4"
+                                           ng-pattern="/^[a-zA-Z0-9]+$/">
                                     <p class="small text-info">No further changeable!</p>
                                     <div ng-messages="partnerForm.client_moniker.$error"
                                          ng-if="partnerForm.client_moniker.$dirty">
diff --git a/src/main/ui/static/payment/partner/templates/add_sub_partner_dialog.html b/src/main/ui/static/payment/partner/templates/add_sub_partner_dialog.html
index a27e39df7..64d9f7be1 100644
--- a/src/main/ui/static/payment/partner/templates/add_sub_partner_dialog.html
+++ b/src/main/ui/static/payment/partner/templates/add_sub_partner_dialog.html
@@ -20,7 +20,7 @@
                                             <input class="form-control text-uppercase" ng-model="partner.client_moniker"
                                                    type="text"
                                                    name="client_moniker"
-                                                   id="short-id-input" readonly>
+                                                   id="short-id-input" required maxlength="4" ng-pattern="/^[a-zA-Z0-9]+$/">
                                             <p class="small text-info">No further changeable!</p>
                                             <div ng-messages="partnerForm.client_moniker.$error"
                                                  ng-if="partnerForm.client_moniker.$dirty">