diff --git a/backend/internal/services/stock_sync.go b/backend/internal/services/stock_sync.go
index 7e9ad23..b522922 100644
--- a/backend/internal/services/stock_sync.go
+++ b/backend/internal/services/stock_sync.go
@@ -147,7 +147,10 @@ func (s *StockSyncService) doSync(ctx context.Context) (int, error) {
 
 func (s *StockSyncService) LatestJob(ctx context.Context) (*models.StockSyncJob, error) {
 	var job models.StockSyncJob
-	if err := s.db.WithContext(ctx).Order("started_at DESC").First(&job).Error; err != nil {
+	if err := s.db.WithContext(ctx).
+		Where("started_at > ?", time.Time{}).
+		Order("started_at DESC").
+		First(&job).Error; err != nil {
 		if err == gorm.ErrRecordNotFound {
 			return nil, nil
 		}
diff --git a/frontend/src/components/StockOverview.tsx b/frontend/src/components/StockOverview.tsx
index b2c6561..c1dde35 100644
--- a/frontend/src/components/StockOverview.tsx
+++ b/frontend/src/components/StockOverview.tsx
@@ -233,9 +233,14 @@ function StockList({
 
 function formatSyncStatus(job: SyncJob): string {
   if (job.status === 'running') return '同步中…'
-  const timeStr = job.finished_at
-    ? new Date(job.finished_at).toLocaleString()
-    : new Date(job.started_at).toLocaleString()
+  const ts = job.finished_at || job.started_at
+  let timeStr = '时间未知'
+  if (ts && ts !== '0001-01-01T00:00:00Z') {
+    const d = new Date(ts)
+    if (!isNaN(d.getTime())) {
+      timeStr = d.toLocaleString()
+    }
+  }
   const statusText = job.status === 'success' ? '成功' : '失败'
   return `${statusText} · ${timeStr}`
 }