It's done.

scripts/character/CharacterTemplate.cs

@@ -617,8 +617,8 @@ public partial class CharacterTemplate : CharacterBody2D
     /// <para>抛出物品</para>
     /// </summary>
     /// <param name="index">
-    ///<para>Item slot subscript in item container</para>
+    ///<para>Item slot index in item container</para>
-    ///<para>物品容器内的物品槽下标</para>
+    ///<para>物品容器内的物品槽位置</para>
     /// </param>
     /// <param name="number">
     /// <para>How many to throw</para>
@@ -633,8 +633,41 @@ public partial class CharacterTemplate : CharacterBody2D
     protected void ThrowItem(int index, int number, Vector2 velocity)
     {
         var itemSlotNode = ItemContainer?.GetItemSlotNode(index);
+        if (itemSlotNode is null) return;
 
-        var item = itemSlotNode?.GetItem();
+        if (number < 0)
+        {
+            while (!itemSlotNode.IsEmpty())
+            {
+                ThrowOneItem(itemSlotNode, velocity);
+            }
+        }
+        else
+        {
+            for (int i = 0; i < number && !itemSlotNode.IsEmpty(); i++)
+            {
+                ThrowOneItem(itemSlotNode, velocity);
+            }
+        }
+    }
+
+    /// <summary>
+    /// <para>Throw item</para>
+    /// <para>抛出物品</para>
+    /// </summary>
+    /// <param name="index">
+    ///<para>Item slot index in item container</para>
+    ///<para>物品容器内的物品槽位置</para>
+    /// </param>
+    /// <param name="velocity">
+    ///<para>The speed to be applied to the item</para>
+    ///<para>要施加到物品上的速度</para>
+    /// </param>
+    protected void ThrowOneItem(ItemSlotNode itemSlotNode, Vector2 velocity)
+    {
+        //Pick an item from the item container
+        //从物品容器内取出一个物品
+        var item = itemSlotNode?.PickItem();
 
         if (item is not Node2D node2D)
         {
@@ -685,17 +718,6 @@ public partial class CharacterTemplate : CharacterBody2D
                 rigidBody2D.LinearVelocity = velocity;
                 break;
         }
-
-        //Remove items from the item container
-        //在物品容器内移除物品
-        if (number < 0)
-        {
-            itemSlotNode!.RemoveItem(item.Quantity);
-        }
-        else
-        {
-            itemSlotNode!.RemoveItem(number);
-        }
     }
 
     /// <summary>

scripts/inventory/ItemSlotNode.cs

@@ -37,6 +37,8 @@ public partial class ItemSlotNode : MarginContainer
 
     public TextureRect? BackgroundTextureRect => _backgroundTextureRect;
 
+    public bool IsEmpty() => _itemStack == null;
+
     /// <summary>
     /// <para>Get the item stack in the item slot</para>
     /// <para>获取物品槽内的物品堆</para>

scripts/item/SingleItemStack.cs

@@ -27,7 +27,7 @@ public class SingleItemStack(IItem_New item) : IItemStack
 
     public int CanTakeFrom(IItemStack itemStack) => 0;
 
-    public int TakeFrom(IItemStack itemStack) => 0;
+    public bool TakeFrom(IItemStack itemStack) => false;
 
     public IItem_New? GetItem()
     {

scripts/item/weapon/WeaponTemplate.cs

@@ -35,6 +35,11 @@ public abstract partial class WeaponTemplate : RigidBody2D, IItem_New
         Fire(owner, targetGlobalPosition);
     }
 
+    public virtual void Destroy()
+    {
+        QueueFree();
+    }
+
 
     /// <summary>
     /// <para>Whether the weapon is currently picked up</para>

scripts/projectile/ProjectileTemplate.cs

@@ -1,8 +1,11 @@
 using System;
+
 using ColdMint.scripts.camp;
 using ColdMint.scripts.character;
 using ColdMint.scripts.damage;
-using ColdMint.scripts.weapon;
+using ColdMint.scripts.item;
+using ColdMint.scripts.item.weapon;
+
 using Godot;
 
 namespace ColdMint.scripts.projectile;
@@ -111,7 +114,9 @@ public partial class ProjectileTemplate : CharacterBody2D
             return true;
         }
 
-        if (target is WeaponTemplate)
+        //Match any item now
+        //现在使它识别任何物品
+        if (target is IItem_New)
         {
             //Bullets are allowed to strike objects.
             //允许子弹撞击物品。
@@ -169,7 +174,8 @@ public partial class ProjectileTemplate : CharacterBody2D
                 force.Y = KnockbackForce.Y * Config.CellSize;
                 characterTemplate.AddForce(force);
             }
-        }else if (target is WeaponTemplate weaponTemplate)
+        }
+        else if (target is WeaponTemplate weaponTemplate)
         {
             if (KnockbackForce != Vector2.Zero)
             {
@@ -225,9 +231,7 @@ public partial class ProjectileTemplate : CharacterBody2D
     /// <para>当子弹离开节点时</para>
     /// </summary>
     /// <param name="node"></param>
-    protected virtual void OnBodyExited(Node2D node)
+    protected virtual void OnBodyExited(Node2D node) { }
-    {
-    }
 
 
     /// <summary>

scripts/utils/NodeUtils.cs

@@ -2,7 +2,7 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using ColdMint.scripts.debug;
-using ColdMint.scripts.weapon;
+using ColdMint.scripts.item.weapon;
 using Godot;
 
 namespace ColdMint.scripts.utils;