diff --git a/service/binance.go b/service/binance.go
index 5e9c51e..9e56d94 100644
--- a/service/binance.go
+++ b/service/binance.go
@@ -28,6 +28,9 @@ func init() {
 	chatID = mustParseInt64(os.Getenv("CHAT_ID"))
 	symbols = strings.Split(os.Getenv("SYMBOLS"), ",")
 
+	// 初始化 singaporeTZ
+	singaporeTZ = time.FixedZone("Asia/Singapore", 8*60*60) // UTC+8
+
 	bot, err = tgbotapi.NewBotAPI(botToken)
 	if err != nil {
 		log.Fatal(err)
@@ -95,7 +98,13 @@ func formatChange(changePercent float64) string {
 }
 
 func sendPriceUpdate() {
-	now := time.Now().In(singaporeTZ)
+	var now time.Time
+	if singaporeTZ != nil {
+		now = time.Now().In(singaporeTZ)
+	} else {
+		now = time.Now().UTC()
+		log.Println("Warning: singaporeTZ is nil, using UTC")
+	}
 	message := fmt.Sprintf("市场更新 - %s (SGT)\n\n", now.Format("2006-01-02 15:04:05"))
 
 	for _, symbol := range symbols {
@@ -132,16 +141,12 @@ func sendPriceUpdate() {
 }
 
 func RunBinance() {
-	log.Println("Sending initial price update...")
-	sendPriceUpdate()
-
-	ticker := time.NewTicker(1 * time.Hour)
-	defer ticker.Stop()
-
+	log.Println("Starting Binance service...")
 	for {
-		select {
-		case <-ticker.C:
-			sendPriceUpdate()
-		}
+		log.Println("Sending price update...")
+		sendPriceUpdate()
+
+		log.Println("Waiting for next update...")
+		time.Sleep(1 * time.Hour)
 	}
 }
diff --git a/service/guard.go b/service/guard.go
index 99f769b..a1dffc0 100644
--- a/service/guard.go
+++ b/service/guard.go
@@ -145,7 +145,7 @@ func StartBot() error {
 
 	log.Printf("Authorized on account %s", bot.Self.UserName)
 
-	err = core.RegisterCommands(bot, adminID)
+	err = core.RegisterCommands(bot, 0)
 	if err != nil {
 		return fmt.Errorf("error registering commands: %w", err)
 	}