diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java
index c4632d3f..edac2eb8 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceReceiptServiceImpl.java
@@ -1244,9 +1244,9 @@ public class InvoiceReceiptServiceImpl extends BaseServiceImpl<InvoiceReceiptMap
 	}
 
 	private String buildAttachmentJson(BfiInvoicePoolVO row) {
-		// 数电票 downloadUrl 可能是 OFD 版式（fileType=4，ZIP 容器），前端按扩展名选预览器：
-		// 依次取 PDF 版式地址（taxPdfUrl/pdfurl，A801-1 样例中两者互有空缺），都缺才用 downloadUrl 并按 fileType 命名
-		String path = Func.isBlank(row.getTaxPdfUrl()) ? row.getPdfurl() : row.getTaxPdfUrl();
+		// 数电票 downloadUrl 可能是 OFD 版式（fileType=4，ZIP 容器），前端按扩展名选预览器。
+		// 下载契约：取 A801-1 的 pdfurl（PDF 版式地址）走 A801-2；taxPdfUrl 兜底，都缺才退 downloadUrl 并按 fileType 命名
+		String path = Func.isBlank(row.getPdfurl()) ? row.getTaxPdfUrl() : row.getPdfurl();
 		boolean fromPdfField = !Func.isBlank(path);
 		if (!fromPdfField) {
 			path = row.getDownloadUrl();