diff --git a/internal/client_channel.go b/internal/client_channel.go
index 8761d45..92e74b4 100644
--- a/internal/client_channel.go
+++ b/internal/client_channel.go
@@ -19,7 +19,7 @@ import (
 func (t *TClient) Channel(ctx context.Context, channel *tg.Channel, cfg *DBChannel, onlyAddChannel bool) error {
 	inputPeer := &tg.InputPeerChannel{ChannelID: channel.ID, AccessHash: channel.AccessHash}
 
-	limit := 20
+	limit := 50
 	request := &tg.MessagesGetHistoryRequest{
 		Peer:  inputPeer,
 		Limit: limit,
diff --git a/internal/cmd_channel_export.go b/internal/cmd_channel_export.go
index ee05a70..a0ac319 100644
--- a/internal/cmd_channel_export.go
+++ b/internal/cmd_channel_export.go
@@ -37,18 +37,13 @@ func channelExportCmd(ctx context.Context) error {
 	if pkID == 0 {
 		return errors.New("db channel id required")
 	}
-
-	channel, err := client.ChannelInfoByID(ctx, pkID)
+	cfg, err := NewDBChannelFromDB(pkID)
 	if err != nil {
 		return err
 	}
 
-	if channel.GetID() == 0 {
-		return errors.New("channel not found")
-	}
-
-	cfg := NewDBChannel(channel.GetID(), channel.Username, channel.Title)
-	if err := cfg.GetOrCreate(ctx); err != nil {
+	channel, err := client.ChannelInfoByID(ctx, cfg.UUID)
+	if err != nil {
 		return err
 	}
 
@@ -57,13 +52,16 @@ func channelExportCmd(ctx context.Context) error {
 		if err := client.Channel(ctx, channel, cfg, false); err != nil {
 			logger.Error("failed to export channel", zap.Error(err), zap.Int64("uuid", channel.GetID()))
 			continueRetryTimes++
-			sleepSeconds := math.Pow(2, float64(continueRetryTimes))
+			sleepSeconds := math.Pow(2, float64(1+continueRetryTimes))
 			if sleepSeconds > 128 {
 				return err
 			}
 
 			logger.Info("retry after", zap.Int("seconds", int(sleepSeconds)))
 			time.Sleep(time.Second * time.Duration(sleepSeconds))
+			continue
 		}
+
+		continueRetryTimes = 0
 	}
 }