diff --git a/kernel/model/flashcard.go b/kernel/model/flashcard.go
index 7408be8bc..9157571e3 100644
--- a/kernel/model/flashcard.go
+++ b/kernel/model/flashcard.go
@@ -329,7 +329,7 @@ func getCardsBlocks(cards []riff.Card, page int) (blocks []*Block, total, pageCo
 		return
 	}
 
-	// sort by due date asc
+	// sort by due date asc https://github.com/siyuan-note/siyuan/pull/9673
 	sort.Slice(cards, func(i, j int) bool {
 		due1 := cards[i].(*riff.FSRSCard).C.Due
 		due2 := cards[j].(*riff.FSRSCard).C.Due