diff --git a/src/Snap.Hutao/Snap.Hutao/Service/Inventory/InventoryService.cs b/src/Snap.Hutao/Snap.Hutao/Service/Inventory/InventoryService.cs
index 5452b29a..9dea0796 100644
--- a/src/Snap.Hutao/Snap.Hutao/Service/Inventory/InventoryService.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Service/Inventory/InventoryService.cs
@@ -1,13 +1,9 @@
 // Copyright (c) DGP Studio. All rights reserved.
 // Licensed under the MIT license.
 
-using Snap.Hutao.Core.ExceptionService;
 using Snap.Hutao.Model.Entity;
-using Snap.Hutao.Model.Metadata.Abstraction;
 using Snap.Hutao.Model.Metadata.Item;
-using Snap.Hutao.Model.Primitive;
 using Snap.Hutao.Service.Cultivation;
-using Snap.Hutao.Service.Metadata;
 using Snap.Hutao.Service.Metadata.ContextAbstraction;
 using Snap.Hutao.Service.Notification;
 using Snap.Hutao.Service.User;
@@ -15,9 +11,6 @@ using Snap.Hutao.ViewModel.Cultivation;
 using Snap.Hutao.ViewModel.User;
 using Snap.Hutao.Web.Hoyolab.Takumi.Event.Calculate;
 using Snap.Hutao.Web.Response;
-using System.Runtime.InteropServices;
-using MetadataAvatar = Snap.Hutao.Model.Metadata.Avatar.Avatar;
-using MetadataWeapon = Snap.Hutao.Model.Metadata.Weapon.Weapon;
 
 namespace Snap.Hutao.Service.Inventory;
 
@@ -25,9 +18,9 @@ namespace Snap.Hutao.Service.Inventory;
 [Injection(InjectAs.Singleton, typeof(IInventoryService))]
 internal sealed partial class InventoryService : IInventoryService
 {
+    private readonly MinimalPromotionDelta minimalPromotionDelta;
     private readonly IServiceScopeFactory serviceScopeFactory;
     private readonly IInventoryDbService inventoryDbService;
-    private readonly IMetadataService metadataService;
     private readonly IInfoBarService infoBarService;
     private readonly IUserService userService;
 
@@ -56,13 +49,7 @@ internal sealed partial class InventoryService : IInventoryService
     /// <inheritdoc/>
     public async ValueTask RefreshInventoryAsync(CultivateProject project)
     {
-        List<ICultivationItemsAccess> cultivationItemsEntryList =
-        [
-            .. await metadataService.GetAvatarListAsync().ConfigureAwait(false),
-            .. await metadataService.GetWeaponListAsync().ConfigureAwait(false),
-        ];
-
-        cultivationItemsEntryList = MinimalPromotionDelta.Find(cultivationItemsEntryList);
+        List<AvatarPromotionDelta> deltas = await minimalPromotionDelta.GetAsync().ConfigureAwait(false);
 
         BatchConsumption? batchConsumption = default;
         using (IServiceScope scope = serviceScopeFactory.CreateScope())
@@ -76,7 +63,7 @@ internal sealed partial class InventoryService : IInventoryService
             CalculateClient calculateClient = scope.ServiceProvider.GetRequiredService<CalculateClient>();
 
             Response<BatchConsumption>? resp = await calculateClient
-                .BatchComputeAsync(userAndUid, GeneratePromotionDeltas(cultivationItemsEntryList), true)
+                .BatchComputeAsync(userAndUid, deltas, true)
                 .ConfigureAwait(false);
 
             if (!resp.IsOk())
@@ -93,97 +80,4 @@ internal sealed partial class InventoryService : IInventoryService
             await inventoryDbService.AddInventoryItemRangeByProjectIdAsync(items.SelectList(item => InventoryItem.From(project.InnerId, item.Id, (uint)((int)item.Num - item.LackNum)))).ConfigureAwait(false);
         }
     }
-
-    private static List<AvatarPromotionDelta> GeneratePromotionDeltas(List<ICultivationItemsAccess> cultivatables)
-    {
-        List<MetadataAvatar> avatars = [];
-        List<MetadataWeapon> weapons = [];
-        HashSet<MaterialId> materialIds = [];
-
-        while (cultivatables.Count > 0)
-        {
-            ICultivationItemsAccess bestItem = cultivatables.OrderByDescending(item => item.CultivationItems.Count(material => !materialIds.Contains(material))).First();
-
-            if (bestItem.CultivationItems.All(materialIds.Contains))
-            {
-                break;
-            }
-
-            switch (bestItem)
-            {
-                case MetadataAvatar avatar:
-                    avatars.Add(avatar);
-                    break;
-                case MetadataWeapon weapon:
-                    weapons.Add(weapon);
-                    break;
-                default:
-                    throw HutaoException.NotSupported();
-            }
-
-            foreach (ref readonly MaterialId materialId in CollectionsMarshal.AsSpan(bestItem.CultivationItems))
-            {
-                materialIds.Add(materialId);
-            }
-
-            cultivatables.Remove(bestItem);
-        }
-
-        List<AvatarPromotionDelta> deltas = [];
-
-        for (int i = 0; i < Math.Max(avatars.Count, weapons.Count); i++)
-        {
-            MetadataAvatar? avatar = avatars.ElementAtOrDefault(i);
-            MetadataWeapon? weapon = weapons.ElementAtOrDefault(i);
-
-            if (avatar is not null)
-            {
-                AvatarPromotionDelta delta = new()
-                {
-                    AvatarId = avatar.Id,
-                    AvatarLevelCurrent = 1,
-                    AvatarLevelTarget = 90,
-                    SkillList = avatar.SkillDepot.CompositeSkillsNoInherents().SelectList(skill => new PromotionDelta()
-                    {
-                        Id = skill.GroupId,
-                        LevelCurrent = 1,
-                        LevelTarget = 10,
-                    }),
-                };
-
-                if (weapon is not null)
-                {
-                    delta.Weapon = new()
-                    {
-                        Id = weapon.Id,
-                        LevelCurrent = 1,
-                        LevelTarget = 90,
-                    };
-                }
-
-                deltas.Add(delta);
-
-                continue;
-            }
-
-            if (weapon is not null)
-            {
-                AvatarPromotionDelta delta = new()
-                {
-                    Weapon = new()
-                    {
-                        Id = weapon.Id,
-                        LevelCurrent = 1,
-                        LevelTarget = 90,
-                    },
-                };
-
-                deltas.Add(delta);
-
-                continue;
-            }
-        }
-
-        return deltas;
-    }
 }
\ No newline at end of file
diff --git a/src/Snap.Hutao/Snap.Hutao/Service/Inventory/MinimalPromotionDelta.cs b/src/Snap.Hutao/Snap.Hutao/Service/Inventory/MinimalPromotionDelta.cs
index 7ea09766..91b3ee84 100644
--- a/src/Snap.Hutao/Snap.Hutao/Service/Inventory/MinimalPromotionDelta.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Service/Inventory/MinimalPromotionDelta.cs
@@ -2,16 +2,43 @@
 // Licensed under the MIT license.
 
 using Google.OrTools.LinearSolver;
+using Microsoft.Extensions.Caching.Memory;
 using Snap.Hutao.Core.ExceptionService;
 using Snap.Hutao.Model.Metadata.Abstraction;
 using Snap.Hutao.Model.Primitive;
+using Snap.Hutao.Service.Metadata;
+using Snap.Hutao.Web.Hoyolab.Takumi.Event.Calculate;
 using System.Runtime.InteropServices;
+using MetadataAvatar = Snap.Hutao.Model.Metadata.Avatar.Avatar;
+using MetadataWeapon = Snap.Hutao.Model.Metadata.Weapon.Weapon;
 
 namespace Snap.Hutao.Service.Inventory;
 
-internal static class MinimalPromotionDelta
+[ConstructorGenerated]
+[Injection(InjectAs.Singleton)]
+internal sealed partial class MinimalPromotionDelta
 {
-    public static List<ICultivationItemsAccess> Find(List<ICultivationItemsAccess> cultivationItems)
+    private const string CacheKey = $"{nameof(MinimalPromotionDelta)}.Cache";
+
+    private readonly IMetadataService metadataService;
+    private readonly IMemoryCache memoryCache;
+
+    public async ValueTask<List<AvatarPromotionDelta>> GetAsync()
+    {
+        if (memoryCache.TryGetRequiredValue(CacheKey, out List<AvatarPromotionDelta>? cache))
+        {
+            return cache;
+        }
+
+        List<ICultivationItemsAccess> cultivationItemsEntryList =
+        [
+            .. await metadataService.GetAvatarListAsync().ConfigureAwait(false),
+            .. (await metadataService.GetWeaponListAsync().ConfigureAwait(false)).Where(w => w.Quality >= Model.Intrinsic.QualityType.QUALITY_BLUE),
+        ];
+        return memoryCache.Set(CacheKey, GeneratePromotionDeltas(Minimize(cultivationItemsEntryList)));
+    }
+
+    private static List<ICultivationItemsAccess> Minimize(List<ICultivationItemsAccess> cultivationItems)
     {
         using (Solver? solver = Solver.CreateSolver("SCIP"))
         {
@@ -54,4 +81,56 @@ internal static class MinimalPromotionDelta
             return results;
         }
     }
+
+    private static List<AvatarPromotionDelta> GeneratePromotionDeltas(List<ICultivationItemsAccess> cultivationItems)
+    {
+        List<AvatarPromotionDelta> deltas = [];
+
+        foreach (ref readonly ICultivationItemsAccess item in CollectionsMarshal.AsSpan(cultivationItems))
+        {
+            switch (item)
+            {
+                case MetadataAvatar avatar:
+                    deltas.Add(new()
+                    {
+                        AvatarId = avatar.Id,
+                        AvatarLevelCurrent = 1,
+                        AvatarLevelTarget = 90,
+                        SkillList = avatar.SkillDepot.CompositeSkillsNoInherents().SelectList(skill => new PromotionDelta()
+                        {
+                            Id = skill.GroupId,
+                            LevelCurrent = 1,
+                            LevelTarget = 10,
+                        }),
+                    });
+                    break;
+                case MetadataWeapon weapon:
+                    if (deltas.FirstOrDefault(d => d.Weapon is null) is { } delta)
+                    {
+                        delta.Weapon = new()
+                        {
+                            Id = weapon.Id,
+                            LevelCurrent = 1,
+                            LevelTarget = 90,
+                        };
+
+                        break;
+                    }
+
+                    deltas.Add(new()
+                    {
+                        Weapon = new()
+                        {
+                            Id = weapon.Id,
+                            LevelCurrent = 1,
+                            LevelTarget = 90,
+                        },
+                    });
+
+                    break;
+            }
+        }
+
+        return deltas;
+    }
 }
\ No newline at end of file