diff --git a/Runtime/Code/Model/GuruInventoryModel.cs b/Runtime/Code/Model/GuruInventoryModel.cs
new file mode 100644
index 0000000..d721aa7
--- /dev/null
+++ b/Runtime/Code/Model/GuruInventoryModel.cs
@@ -0,0 +1,117 @@
+
+using UnityEngine.Serialization;
+
+namespace Guru
+{
+    using System;
+    using UnityEngine;
+    using System.Collections.Generic;
+
+    
+    [Serializable]
+    public class GuruInventoryModel: GuruModelBase
+    {
+        public Dictionary<string, UserItemInfo> data;
+        public Dictionary<string, UserItemInfo> Data => data ??= new Dictionary<string, UserItemInfo>(20);
+        
+        public bool RegisterItem(string itemName, int initCount = 0, string type = "")
+        {
+            if (!HasItem(itemName))
+            {
+                Data[itemName] = new UserItemInfo()
+                {
+                    key = itemName,
+                    free_amount = initCount,
+                    paid_amount = 0,
+                    type = type
+                };
+                return true;
+            }
+            return false;
+        }
+        
+        
+        public bool HasItem(string itemName)
+        {
+            return Data.ContainsKey(itemName);
+        }
+
+        public UserItemInfo GetItemInfo(string itemName)
+        {
+            if (Data.TryGetValue(itemName, out var item))
+            {
+                return item;
+            }
+            return null;
+        }
+
+    }
+
+
+    [Serializable]
+    public class UserItemInfo
+    {
+        public bool enableZeroProtection = true; // 默认开启 0 值保护
+        public string key;
+        public int free_amount;
+        public int paid_amount;
+        public string type;
+
+        /// <summary>
+        /// 道具总量
+        /// </summary>
+        public int TotalAmount => free_amount + paid_amount;
+        
+        /// <summary>
+        /// 增减道具量
+        /// </summary>
+        /// <param name="amount"></param>
+        /// <param name="isPaid"></param>
+        public bool Change(int amount, bool isPaid = false)
+        {
+            if (amount == 0) return false;
+            
+            if (isPaid)
+            {
+                if (amount < 0 && enableZeroProtection && paid_amount + amount < 0)
+                    return false;
+                
+                paid_amount += amount;
+            }
+            else
+            {
+                if (amount < 0 && enableZeroProtection && free_amount + amount < 0)
+                    return false;
+                
+                free_amount += amount;
+            }
+
+            return true;
+        }
+        
+        /// <summary>
+        /// 强制设置数量
+        /// </summary>
+        /// <param name="freeAmount"></param>
+        /// <param name="paidAmount"></param>
+        public void Set(int freeAmount, int paidAmount = 0)
+        {
+            paid_amount = paidAmount;
+            free_amount = freeAmount;
+        }
+        
+        /// <summary>
+        /// 数值清零
+        /// </summary>
+        public void Clean()
+        {
+            paid_amount = 0;
+            free_amount = 0;
+        }
+
+
+    }
+
+
+
+}
\ No newline at end of file
diff --git a/Runtime/Code/Model/GuruInventoryModel.cs.meta b/Runtime/Code/Model/GuruInventoryModel.cs.meta
new file mode 100644
index 0000000..dcd8f4f
--- /dev/null
+++ b/Runtime/Code/Model/GuruInventoryModel.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 4d8be99a0fca428da9c6e70bc9cbea36
+timeCreated: 1706787422
\ No newline at end of file
diff --git a/Runtime/Code/Model/GuruModelBase.cs b/Runtime/Code/Model/GuruModelBase.cs
new file mode 100644
index 0000000..66b38fc
--- /dev/null
+++ b/Runtime/Code/Model/GuruModelBase.cs
@@ -0,0 +1,74 @@
+
+
+namespace Guru
+{
+
+    using UnityEngine;
+
+    
+    public abstract class GuruModelBase
+    {
+
+
+        #region DataIO
+
+        private double _lastSavedTime = 0;
+        
+        protected double _saveInterval = 3;
+        protected string DefaultSaveKey => GetType().Name;
+        
+        /// <summary>
+        /// 加载数据 IO 接口
+        /// </summary>
+        /// <param name="saveKey"></param>
+        /// <typeparam name="T"></typeparam>
+        /// <returns></returns>
+        internal static T LoadIO<T>(string saveKey = "") where T : GuruModelBase, new()
+        {
+            if (string.IsNullOrEmpty(saveKey)) saveKey = typeof(T).Name;
+            if (PlayerPrefs.HasKey(saveKey))
+            {
+                var json = PlayerPrefs.GetString(saveKey, "");
+                if (!string.IsNullOrEmpty(json))
+                {
+                    // return JsonUtility.FromJson<T>(json);
+                    return JsonParser.ToObject<T>(json);
+                }
+            }
+            return new T();
+        }
+
+        /// <summary>
+        /// 保存数据 IO 接口
+        /// </summary>
+        /// <param name="saveKey"></param>
+        protected void SaveIO(string saveKey = "")
+        {
+            if (string.IsNullOrEmpty(saveKey)) saveKey = DefaultSaveKey;
+            var json = JsonParser.ToJson(this);
+            PlayerPrefs.SetString(saveKey, json);
+            PlayerPrefs.Save();
+        }
+
+        /// <summary>
+        /// 保存数据
+        /// </summary>
+        /// <param name="force"></param>
+        public virtual void Save(bool force = false)
+        {
+            bool save = force || (Time.realtimeSinceStartup - _lastSavedTime>= _saveInterval);
+            if (save)
+            {
+                _lastSavedTime = Time.realtimeSinceStartup;
+                SaveIO();
+            }
+        }
+
+
+
+        #endregion
+        
+        
+        
+    }
+}
\ No newline at end of file
diff --git a/Runtime/Code/Model/GuruModelBase.cs.meta b/Runtime/Code/Model/GuruModelBase.cs.meta
new file mode 100644
index 0000000..f5bae58
--- /dev/null
+++ b/Runtime/Code/Model/GuruModelBase.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: c99bee149c95459f93ccf3fe587788a0
+timeCreated: 1706787492
\ No newline at end of file
diff --git a/Runtime/Code/Model/GuruSDKModel.cs b/Runtime/Code/Model/GuruSDKModel.cs
index c65f581..4954412 100644
--- a/Runtime/Code/Model/GuruSDKModel.cs
+++ b/Runtime/Code/Model/GuruSDKModel.cs
@@ -10,9 +10,8 @@ namespace Guru
     
     
     [Serializable]
-    internal class GuruSDKModel
+    internal class GuruSDKModel: GuruModelBase
     {
-        private const float SaveInterval = 3;
         private const string SaveKey = "com.guru.sdk.model.save";
         
         
@@ -21,7 +20,7 @@ namespace Guru
         {
             get
             {
-                if (null == _instance) _instance = Load();
+                if (null == _instance) _instance = Init();
                 return _instance;
             }
         }
@@ -35,7 +34,7 @@ namespace Guru
         public List<PurchasedProduct> purchased;
         //-------------- data ---------------
 
-        private float _lastSavedTime = 0;
+        
         
         public int SuccessLevelCount
         {
@@ -108,39 +107,13 @@ namespace Guru
 
         #region 初始化
 
-        
-        public static GuruSDKModel Load()
+        private static GuruSDKModel Init()
         {
-            GuruSDKModel model = null;
-            if (PlayerPrefs.HasKey(SaveKey))
-            {
-                var json = PlayerPrefs.GetString(SaveKey, "");
-                if (!string.IsNullOrEmpty(json))
-                {
-                    try
-                    {
-                        model =  JsonUtility.FromJson<GuruSDKModel>(json);
-                    }
-                    catch (Exception e)
-                    {
-                        Debug.LogError(e);
-                    }
-                }
-            }
-            if(model == null) model = new GuruSDKModel();
+            GuruSDKModel model = LoadIO<GuruSDKModel>(SaveKey);
             model.InitProperties();
             return model;
         }
         
-        /// <summary>
-        /// 保存至数据
-        /// </summary>
-        private void SaveToPlayerPrefs()
-        {
-            var json = JsonUtility.ToJson(this);
-            PlayerPrefs.SetString(SaveKey, json);
-        }
-
         public void InitProperties()
         {
             _successLevel = new BindableProperty<int>(b_level, OnLevelChanged);
@@ -150,20 +123,6 @@ namespace Guru
 
             purchased = new List<PurchasedProduct>(20);
         }
-        
-        /// <summary>
-        /// 保存数据
-        /// </summary>
-        /// <param name="force"></param>
-        public void Save(bool force = false)
-        {
-            bool save = force || (Time.realtimeSinceStartup - _lastSavedTime>= SaveInterval);
-            if (save)
-            {
-                _lastSavedTime = Time.realtimeSinceStartup;
-                SaveToPlayerPrefs();
-            }
-        }
 
 
         #endregion
diff --git a/Runtime/Code/SDK/GuruSDK.Analytics.cs b/Runtime/Code/SDK/GuruSDK.Analytics.cs
index abc60e9..850e599 100644
--- a/Runtime/Code/SDK/GuruSDK.Analytics.cs
+++ b/Runtime/Code/SDK/GuruSDK.Analytics.cs
@@ -262,6 +262,21 @@ namespace Guru
         }
         
         
+        #endregion
+
+        #region 经济打点
+
+        public static void EarnVirtualCurrency()
+        {
+            
+        }
+
+        public static void SpendVirtualCurrency()
+        {
+            
+        }
+        
+        
         #endregion
     }
 }
\ No newline at end of file