diff --git a/daxpay-channel/daxpay-channel-alipay/src/main/java/cn/daxpay/open/channel/alipay/service/payment/pay/AlipayPayService.java b/daxpay-channel/daxpay-channel-alipay/src/main/java/cn/daxpay/open/channel/alipay/service/payment/pay/AlipayPayService.java
index 0e101df3a..4bdde4b7b 100644
--- a/daxpay-channel/daxpay-channel-alipay/src/main/java/cn/daxpay/open/channel/alipay/service/payment/pay/AlipayPayService.java
+++ b/daxpay-channel/daxpay-channel-alipay/src/main/java/cn/daxpay/open/channel/alipay/service/payment/pay/AlipayPayService.java
@@ -54,6 +54,8 @@ public class AlipayPayService {
         req.setOpenId(payParam.getOpenId());
         // 通道通知地址: 始终使用平台生成的回调地址(支付宝→平台), 不使用 payParam.notifyUrl(语义为平台→商户)
         req.setNotifyUrl(this.buildNotifyUrl(order));
+        // 关单时间透传, 子应用据此向支付宝设置 time_expire
+        req.setExpireTime(payParam.getExpiredTime());
         req.setCredential(credential);
 
         // 调用子应用
diff --git a/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/unipay/param/trade/pay/NormalPayParam.java b/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/unipay/param/trade/pay/NormalPayParam.java
index 41e4bcc4a..85317480a 100644
--- a/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/unipay/param/trade/pay/NormalPayParam.java
+++ b/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/unipay/param/trade/pay/NormalPayParam.java
@@ -4,7 +4,6 @@ import cn.daxpay.open.platform.core.enums.pay.channel.ProductEnum;
 import cn.daxpay.open.platform.core.enums.pay.channel.PayMethodEnum;
 import cn.daxpay.open.payment.unipay.param.MerchantPaymentCommonParam;
 import jakarta.validation.Valid;
-import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.Valid;
 import jakarta.validation.constraints.*;
@@ -119,8 +118,9 @@ public class NormalPayParam extends MerchantPaymentCommonParam {
     // ===== 时间 =====
 
     /// 过期时间（北京时间，格式 yyyy-MM-dd HH:mm:ss，空则默认 30 分钟）
+    /// 注: 实际反序列化由全局 DaxpayOffsetDateTimeDeserializer 处理(按 Asia/Shanghai 解析后转 UTC),
+    /// 此处不标 @JsonFormat 以免误导(注解会被全局反序列化器覆盖)
     @Schema(description = "过期时间(北京时间，yyyy-MM-dd HH:mm:ss)")
-    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
     private OffsetDateTime expiredTime;
 
     // ===== 终端信息（线下场景选填）=====