diff --git a/app/adminapi/logic/finance/FinancePaymentPlanLogic.php b/app/adminapi/logic/finance/FinancePaymentPlanLogic.php
index 889a858ad..93643f021 100644
--- a/app/adminapi/logic/finance/FinancePaymentPlanLogic.php
+++ b/app/adminapi/logic/finance/FinancePaymentPlanLogic.php
@@ -63,7 +63,7 @@ class FinancePaymentPlanLogic extends BaseLogic
                 'foreign_currency_remark' => $params['foreign_currency_remark'] ?? '',
                 'status' => $params['status'],
                 'remark' => $params['remark'] ?? '',
-                'annex' => !empty( $params['annex']) ? $params['annex'] : null,
+                'annex' => $params['annex'] ? json_encode($params['annex']) : null,
             ]);
             Db::commit();
             return true;
@@ -105,7 +105,7 @@ class FinancePaymentPlanLogic extends BaseLogic
 	            'foreign_currency_remark' => $params['foreign_currency_remark'] ?? '',
 	            'status' => $params['status'],
 	            'remark' => $params['remark'] ?? '',
-	            'annex' => !empty( $params['annex']) ? $params['annex'] : null,
+	            'annex' => $params['annex'] ? json_encode($params['annex']) : null,
             ]);
             Db::commit();
             return true;