diff --git a/xs.sh b/xs.sh
index 3b1c6c9..211a463 100644
--- a/xs.sh
+++ b/xs.sh
@@ -14,28 +14,24 @@ fi
 
 # 添加限速规则
 add_limit() {
-    echo "Adding bandwidth limit of $LIMIT_RATE on ports 8337 and 8338 for interface $INTERFACE..."
+    echo "Applying new bandwidth limit..."
 
-    # 添加全局队列规则（上行限制）
+    # 清理旧规则
+    tc qdisc del dev "$INTERFACE" root 2>/dev/null
+    tc qdisc del dev ifb0 root 2>/dev/null
+
+    # 添加上行规则
     tc qdisc add dev "$INTERFACE" root handle 1: htb default 11
     tc class add dev "$INTERFACE" parent 1: classid 1:1 htb rate "$LIMIT_RATE"
     tc class add dev "$INTERFACE" parent 1:1 classid 1:11 htb rate "$LIMIT_RATE"
-
-    # 针对端口 8337 上行流量添加过滤规则
     tc filter add dev "$INTERFACE" protocol ip parent 1:0 prio 1 u32 match ip dport 8337 0xffff flowid 1:11
-
-    # 针对端口 8338 上行流量添加过滤规则
     tc filter add dev "$INTERFACE" protocol ip parent 1:0 prio 1 u32 match ip dport 8338 0xffff flowid 1:11
 
-    # 添加全局队列规则（下行限制）
+    # 添加下行规则
     tc qdisc add dev ifb0 root handle 1: htb default 11
     tc class add dev ifb0 parent 1: classid 1:1 htb rate "$LIMIT_RATE"
     tc class add dev ifb0 parent 1:1 classid 1:11 htb rate "$LIMIT_RATE"
-
-    # 针对端口 8337 下行流量添加过滤规则
     tc filter add dev ifb0 protocol ip parent 1:0 prio 1 u32 match ip sport 8337 0xffff flowid 1:11
-
-    # 针对端口 8338 下行流量添加过滤规则
     tc filter add dev ifb0 protocol ip parent 1:0 prio 1 u32 match ip sport 8338 0xffff flowid 1:11
 
     echo "Bandwidth limit applied successfully."