diff --git a/app/adminapi/logic/project/ProjectTravelReimbursementLogic.php b/app/adminapi/logic/project/ProjectTravelReimbursementLogic.php
index 3a8043b06..a829a8363 100644
--- a/app/adminapi/logic/project/ProjectTravelReimbursementLogic.php
+++ b/app/adminapi/logic/project/ProjectTravelReimbursementLogic.php
@@ -90,7 +90,7 @@ class ProjectTravelReimbursementLogic extends BaseLogic
 					'invoice_form' => $item['invoice_form'],
 					'invoice_amount' => $item['invoice_amount'],
 					'tax_amount' => $tax_rate[$item['tax_rate']] / 100 * $item['invoice_amount'],
-					'annex' => $item['annex'] ? json_encode($item['annex']) : null,
+					'annex' => !empty($item['annex']) ? json_encode($item['annex']) : null,
 					'remark' => $item['remark'] ?? '',
 				]);
 			}
@@ -172,7 +172,7 @@ class ProjectTravelReimbursementLogic extends BaseLogic
 				        'invoice_form' => $item['invoice_form'],
 				        'invoice_amount' => $item['invoice_amount'],
 				        'tax_amount' => $tax_rate[$item['tax_rate']] / 100 * $item['invoice_amount'],
-				        'annex' => $item['annex'] ? json_encode($item['annex']) : null,
+				        'annex' => !empty($item['annex']) ? json_encode($item['annex']) : null,
 				        'remark' => $item['remark'] ?? '',
 				        'update_time' => time(),
 			        ]);
@@ -185,7 +185,7 @@ class ProjectTravelReimbursementLogic extends BaseLogic
 				        'invoice_form' => $item['invoice_form'],
 				        'invoice_amount' => $item['invoice_amount'],
 				        'tax_amount' => $tax_rate[$item['tax_rate']] / 100 * $item['invoice_amount'],
-				        'annex' => $item['annex'] ? json_encode($item['annex']) : null,
+				        'annex' => !empty($item['annex']) ? json_encode($item['annex']) : null,
 				        'remark' => $item['remark'] ?? '',
 			        ]);
 		        }