diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/controller/ProjectChangeController.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/controller/ProjectChangeController.java
index c697286c..7bfdf1e6 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/controller/ProjectChangeController.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/controller/ProjectChangeController.java
@@ -33,6 +33,7 @@ import org.springblade.core.mp.support.Condition;
 import org.springblade.core.mp.support.Query;
 import org.springblade.core.secure.annotation.PreAuth;
 import org.springblade.core.tool.api.R;
+import org.springblade.transport.constant.HcsSyncConstant;
 import org.springblade.transport.pojo.entity.ProjectChange;
 import org.springblade.transport.pojo.vo.ProjectChangeVO;
 import org.springblade.transport.service.IProjectChangeService;
@@ -110,17 +111,12 @@ public class ProjectChangeController extends BladeController {
 		hcsImmediatePushSupport.pushProjectAndWait(projectId);
 		String syncFailure = HcsImmediatePushSupport.pollSyncFailure();
 		if (syncFailure != null) {
-			ProjectChange projectChange = projectChangeService.getById(id);
-			if (projectChange != null) {
-				projectChange.setSyncStatus("failed");
-				projectChangeService.updateById(projectChange);
-			}
+			projectChangeService.writeBackSyncStatus(projectId, HcsSyncConstant.HCS_STATUS_FAILED);
 			return R.data(Boolean.FALSE, "审批通过，但合规推送失败：" + syncFailure);
 		}
-		ProjectChange projectChange = projectChangeService.getById(id);
-		if (projectChange != null) {
-			projectChange.setSyncStatus("synced");
-			projectChangeService.updateById(projectChange);
+		// 即时推送未开启时（开关关闭不触发推送）不标记已推送，待推送状态由定时扫描任务推送后闭环
+		if (hcsImmediatePushSupport.isImmediateEnabled()) {
+			projectChangeService.writeBackSyncStatus(projectId, HcsSyncConstant.HCS_STATUS_SYNCED);
 		}
 		return R.success("审批通过");
 	}
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/IProjectChangeService.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/IProjectChangeService.java
index 1cbafa62..81fd622a 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/IProjectChangeService.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/IProjectChangeService.java
@@ -67,4 +67,13 @@ public interface IProjectChangeService extends BaseService<ProjectChange> {
 
 	boolean removeDraft(String ids);
 
+	/**
+	 * 按原项目回写最近一条待同步变更单的同步状态（审批即时推送/定时任务推送后调用）
+	 *
+	 * @param projectId 原项目ID
+	 * @param syncStatus 同步状态（synced/failed）
+	 * @return 是否回写成功（无待同步变更单时返回 false）
+	 */
+	boolean writeBackSyncStatus(Long projectId, String syncStatus);
+
 }
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectChangeServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectChangeServiceImpl.java
index 313573b9..ecb31750 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectChangeServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectChangeServiceImpl.java
@@ -188,7 +188,11 @@ public class ProjectChangeServiceImpl extends BaseServiceImpl<ProjectChangeMappe
 		String processor = TransportBusinessSupport.trimToNull(AuthUtil.getUserName());
 		projectChange.setCurrentProcessor(processor == null ? "系统" : processor);
 		projectChange.setApprovedTime(LocalDateTime.now());
-		projectChange.setSyncStatus(HcsSyncConstant.HCS_STATUS_UNSYNCED);
+		// 仅原项目已推送合规（有合规单据ID标识 hcs_fd_id）的变更单参与合规推送（C102-2），存量未推送项目不置同步状态
+		ProjectApply projectApply = projectApplyService.getById(projectChange.getProjectId());
+		if (projectApply != null && Func.isNotBlank(projectApply.getHcsFdId())) {
+			projectChange.setSyncStatus(HcsSyncConstant.HCS_STATUS_UNSYNCED);
+		}
 		updateById(projectChange);
 		projectApplyService.applyChangeFromRecord(projectChange);
 		return projectChange.getProjectId();
@@ -230,6 +234,20 @@ public class ProjectChangeServiceImpl extends BaseServiceImpl<ProjectChangeMappe
 		return deleteLogic(idList);
 	}
 
+	@Override
+	public boolean writeBackSyncStatus(Long projectId, String syncStatus) {
+		if (projectId == null) {
+			return false;
+		}
+		// 仅回写该项目最近一条审批通过且未同步/失败的变更单，历史已闭环单据不翻动
+		return update(Wrappers.<ProjectChange>lambdaUpdate()
+			.eq(ProjectChange::getProjectId, projectId)
+			.eq(ProjectChange::getApprovalStatus, STATUS_APPROVED)
+			.in(ProjectChange::getSyncStatus, List.of(HcsSyncConstant.HCS_STATUS_UNSYNCED, HcsSyncConstant.HCS_STATUS_FAILED))
+			.set(ProjectChange::getSyncStatus, syncStatus)
+			.last("order by approved_time desc limit 1"));
+	}
+
 	private LambdaQueryWrapper<ProjectChange> buildQuery(ProjectChangeVO projectChange) {
 		TransportBusinessSupport.validateAllDept(projectChange.getAllDept(), "项目变更");
 		LambdaQueryWrapper<ProjectChange> queryWrapper = Wrappers.<ProjectChange>lambdaQuery().eq(ProjectChange::getIsDeleted, 0);