diff --git a/cdc/puller/puller.go b/cdc/puller/puller.go
index 11c5003d94c..09c30f6cd51 100644
--- a/cdc/puller/puller.go
+++ b/cdc/puller/puller.go
@@ -254,7 +254,9 @@ func (p *pullerImpl) Run(ctx context.Context) error {
 func (p *pullerImpl) detectResolvedTsStuck() error {
 	if p.cfg.Debug.Puller.EnableResolvedTsStuckDetection {
 		resolvedTs := p.tsTracker.Frontier()
-		// check if the resolvedTs is advanced before
+		// check if the resolvedTs is advancing,
+		// If the resolvedTs in Frontier is less than startResolvedTs, it means that the incremental scan has 
+		// not complete yet. We need to make no decision in this scenario. 
 		if resolvedTs <= p.startResolvedTs {
 			return nil
 		}