diff --git a/AIParkingApplication/Statistic.cs b/AIParkingApplication/Statistic.cs
index 016abfd..efda3d1 100644
--- a/AIParkingApplication/Statistic.cs
+++ b/AIParkingApplication/Statistic.cs
@@ -10,7 +10,8 @@ namespace AIParkingApplication
     {
         private readonly HttpClient client;
         private readonly Thread thrStatistics;
-        private readonly int timeCycle;
+        private readonly TimeSpan updateInterval;
+        private ParkInfo parkInfo;
 
         private Label lblLoaiXe;
         private Label lblXeMay;
@@ -19,10 +20,10 @@ namespace AIParkingApplication
         private Label lblSoLuongXeMay;
         private Label lblSoLuongOto;
 
-        public Statistic(string baseAddress, int timeCycle_Sec = 1)
+        public Statistic(string baseAddress, TimeSpan updateInterval)
         {
             InitializeComponent();
-            timeCycle = timeCycle_Sec; ;
+            this.updateInterval = updateInterval;
             client = new HttpClient { BaseAddress = new Uri(baseAddress), Timeout = TimeSpan.FromMilliseconds(5000) };
             thrStatistics = new Thread(new ThreadStart(GetStatistic)) { IsBackground = true };
             thrStatistics.Start();
@@ -33,7 +34,8 @@ namespace AIParkingApplication
             while (true)
             {
                 GetDataFromServer();
-                Thread.Sleep(timeCycle * 1000);
+                ShowInfo();
+                Thread.Sleep(updateInterval);
             }
         }
 
@@ -43,36 +45,16 @@ namespace AIParkingApplication
             {
                 HttpResponseMessage response = await client.GetAsync("/api/statistics");
                 response.EnsureSuccessStatusCode();
-                var parkInfo = await response.Content.ReadAsAsync<ParkInfo>();
-                if(parkInfo == null)
+                parkInfo = await response.Content.ReadAsAsync<ParkInfo>();
+                
+                if (string.IsNullOrEmpty(parkInfo.TotalIn))
                 {
-                    return;
+                    parkInfo.TotalIn = "0";
                 }
-                lblSoLuongXeMay.Invoke(new Action(() =>
+                if (string.IsNullOrEmpty(parkInfo.TotalOut))
                 {
-                    lblSoLuongXeMay.Text = parkInfo.NumberOfMoto.ToString();
-                }));
-                lblSoLuongOto.Invoke(new Action(() =>
-                {
-                    lblSoLuongOto.Text = parkInfo.NumberOfCar.ToString();
-                }));
-                lblVehicleTotalIn.Invoke(new Action(() =>
-                {
-                    if (string.IsNullOrEmpty(parkInfo.TotalIn))
-                    {
-                        parkInfo.TotalIn = "0";
-                    }
-                    lblVehicleTotalIn.Text = parkInfo.TotalIn;
-                }));
-                lblVehicleTotalOut.Invoke(new Action(() =>
-                {
-                    if (string.IsNullOrEmpty(parkInfo.TotalOut))
-                    {
-                        parkInfo.TotalOut = "0";
-                    }
-                    lblVehicleTotalOut.Text = parkInfo.TotalOut;
-                }));
-
+                    parkInfo.TotalOut = "0";
+                }
             }
             catch (Exception ex)
             {
@@ -80,6 +62,31 @@ namespace AIParkingApplication
             }
         }
 
+        private void ShowInfo()
+        {
+            if (parkInfo == null)
+            {
+                return;
+            }
+            lblSoLuongXeMay.Invoke(new Action(() =>
+            {
+                lblSoLuongXeMay.Text = parkInfo.NumberOfMoto.ToString();
+            }));
+            lblSoLuongOto.Invoke(new Action(() =>
+            {
+                lblSoLuongOto.Text = parkInfo.NumberOfCar.ToString();
+            }));
+            lblVehicleTotalIn.Invoke(new Action(() =>
+            {
+                lblVehicleTotalIn.Text = parkInfo.TotalIn;
+            }));
+            lblVehicleTotalOut.Invoke(new Action(() =>
+            {
+                lblVehicleTotalOut.Text = parkInfo.TotalOut;
+            }));
+        }
+
+
         private void Statistic_Load(object sender, EventArgs e)
         {
             tlpStatisticTable.BorderStyle = BorderStyle.FixedSingle;