diff --git a/RMuseum/RMuseum.xml b/RMuseum/RMuseum.xml
index 988a058c..6d9586e8 100644
--- a/RMuseum/RMuseum.xml
+++ b/RMuseum/RMuseum.xml
@@ -10287,6 +10287,9 @@
             <summary>
             IGanjoorService implementation
             </summary>
+            <summary>
+            IGanjoorService implementation
+            </summary>
         </member>
         <member name="M:RMuseum.Services.Implementation.GanjoorService.SwitchCoupletBookmark(System.Guid,System.Int32,System.Int32)">
             <summary>
@@ -10348,6 +10351,12 @@
             <param name="userId"></param>
             <returns></returns>
         </member>
+        <member name="M:RMuseum.Services.Implementation.GanjoorService.RegenerateHalfCenturiesAsync">
+            <summary>
+            regenerate half centuries
+            </summary>
+            <returns></returns>
+        </member>
         <member name="M:RMuseum.Services.Implementation.GanjoorService.FindCategoryPoemsRhythms(System.Int32,System.Boolean,System.String)">
             <summary>
             find category poem rhymes
diff --git a/RMuseum/Services/Implementation/GanjoorService-Partials/GanjoorService-Centuries.cs b/RMuseum/Services/Implementation/GanjoorService-Partials/GanjoorService-Centuries.cs
new file mode 100644
index 00000000..1bd30bae
--- /dev/null
+++ b/RMuseum/Services/Implementation/GanjoorService-Partials/GanjoorService-Centuries.cs
@@ -0,0 +1,239 @@
+using Microsoft.EntityFrameworkCore;
+using RMuseum.Models.Ganjoor;
+using RSecurityBackend.Models.Generic;
+using System;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using RSecurityBackend.Services.Implementation;
+using RMuseum.Models.Ganjoor.ViewModels;
+using System.Collections.Generic;
+
+namespace RMuseum.Services.Implementation
+{
+    /// <summary>
+    /// IGanjoorService implementation
+    /// </summary>
+    public partial class GanjoorService : IGanjoorService
+    {
+        /// <summary>
+        /// regenerate half centuries
+        /// </summary>
+        /// <returns></returns>
+        public async Task<RServiceResult<bool>> RegenerateHalfCenturiesAsync()
+        {
+            try
+            {
+                var oldOnes = await _context.GanjoorHalfCenturies.ToArrayAsync();
+                _context.RemoveRange(oldOnes);
+                await _context.SaveChangesAsync();
+
+                var periods = new List<GanjoorHalfCentury>
+                {
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 1,
+                        Name = "قرن سوم",
+                        StartYear = 0,
+                        EndYear = 300,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 2,
+                        Name = "سوم و چهارم",
+                        StartYear = 250,
+                        EndYear = 350,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 3,
+                        Name = "قرن چهارم",
+                        StartYear = 300,
+                        EndYear = 400,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 4,
+                        Name = "چهارم و پنجم",
+                        StartYear = 350,
+                        EndYear = 450,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 5,
+                        Name = "قرن پنجم",
+                        StartYear = 400,
+                        EndYear = 500,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 6,
+                        Name = "پنجم و ششم",
+                        StartYear = 450,
+                        EndYear = 550,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 7,
+                        Name = "قرن ششم",
+                        StartYear = 500,
+                        EndYear = 600,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 8,
+                        Name = "ششم و هفتم",
+                        StartYear = 550,
+                        EndYear = 650,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 9,
+                        Name = "قرن هفتم",
+                        StartYear = 600,
+                        EndYear = 700,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 10,
+                        Name = "هفتم و هشتم",
+                        StartYear = 650,
+                        EndYear = 750,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 11,
+                        Name = "قرن هشتم",
+                        StartYear = 700,
+                        EndYear = 800,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 12,
+                        Name = "هشتم و نهم",
+                        StartYear = 750,
+                        EndYear = 850,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 13,
+                        Name = "قرن نهم",
+                        StartYear = 800,
+                        EndYear = 900,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 14,
+                        Name = "نهم و دهم",
+                        StartYear = 850,
+                        EndYear = 950,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 15,
+                        Name = "قرن دهم",
+                        StartYear = 900,
+                        EndYear = 1000,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 16,
+                        Name = "دهم و یازدهم",
+                        StartYear = 950,
+                        EndYear = 1050,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 17,
+                        Name = "قرن یازدهم",
+                        StartYear = 1000,
+                        EndYear = 1100,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 18,
+                        Name = "یازذهم و دوازدهم",
+                        StartYear = 1050,
+                        EndYear = 1150,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 19,
+                        Name = "قرن دوازدهم",
+                        StartYear = 1100,
+                        EndYear = 1200,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 20,
+                        Name = "دوازدهم و سیزدهم",
+                        StartYear = 1150,
+                        EndYear = 1250,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 21,
+                        Name = "قرن سیزدهم",
+                        StartYear = 1200,
+                        EndYear = 1300,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 22,
+                        Name = "سیزدهم و چهاردهم",
+                        StartYear = 1250,
+                        EndYear = 1350,
+                        ShowInTimeLine = false,
+                    },
+                     new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 23,
+                        Name = "قرن چهاردهم",
+                        StartYear = 1300,
+                        EndYear = 1400,
+                        ShowInTimeLine = true,
+                    },
+                    new GanjoorHalfCentury()
+                    {
+                        HalfCenturyOrder = 24,
+                        Name = "چهاردهم و پانزدهم",
+                        StartYear = 1350,
+                        EndYear = 1450,
+                        ShowInTimeLine = false,
+                    },
+    
+                };
+
+                var poets = await _context.GanjoorPoets.AsNoTracking().Where(p => p.BirthYearInLHijri != 0).OrderBy(p => new { p.BirthYearInLHijri, p.DeathYearInLHijri }).ToArrayAsync();
+
+
+                return new RServiceResult<bool>(true);
+            }
+            catch (Exception exp)
+            {
+                return new RServiceResult<bool>(false, exp.ToString());
+            }
+        }
+    }
+}