diff --git a/contract/Forest/ForestContractConstants.cs b/contract/Forest/ForestContractConstants.cs
index db5de96..fa17ac7 100644
--- a/contract/Forest/ForestContractConstants.cs
+++ b/contract/Forest/ForestContractConstants.cs
@@ -26,5 +26,8 @@ public partial class ForestContract
     public const int DefaultMaxBatchCancelListCount= 20;
     public const string CollectionSymbolSuffix = "0";
     public const string SymbolSeparator = "-";
-
+    public const long DefaultApproveAllowance = 10000;
+    public const long MaxApproveAllowance = 9223372000000000000;
+    
+    
 }
\ No newline at end of file
diff --git a/contract/Forest/ForestContract_Sellers.cs b/contract/Forest/ForestContract_Sellers.cs
index e9904e6..3e5cd01 100644
--- a/contract/Forest/ForestContract_Sellers.cs
+++ b/contract/Forest/ForestContract_Sellers.cs
@@ -126,12 +126,14 @@ public override Empty ListWithFixedPrice(ListWithFixedPriceInput input)
         var collectionAllowance = State.ListedNFTTotalAmountMap[collectionSymbol][Context.Sender];
         if (collectionAllowance == null || collectionAllowance == "")
         {
-            State.ListedNFTTotalAmountMap[collectionSymbol][Context.Sender] =
-                Math.Max(allowance, input.Quantity).ToString();
+            var listedNFTTotalAmount = (allowance >= MaxApproveAllowance) ? input.Quantity : Math.Max(allowance, input.Quantity);
+            State.ListedNFTTotalAmountMap[collectionSymbol][Context.Sender] = listedNFTTotalAmount.ToString();
         }
         else
         {
-            var originQuantity = long.Parse(collectionAllowance);
+            var originQuantity = (long.Parse(collectionAllowance) >= MaxApproveAllowance)
+                ? DefaultApproveAllowance
+                : long.Parse(collectionAllowance);
             State.ListedNFTTotalAmountMap[collectionSymbol][Context.Sender] =
                 (input.Quantity + originQuantity).ToString();
         }
@@ -238,7 +240,7 @@ private Empty SingleDelist(DelistInput input)
             var originQuantity = long.Parse(collectionAllowance);
             var resultQuantity = originQuantity - input.Quantity;
             State.ListedNFTTotalAmountMap[collectionSymbol][Context.Sender] =
-                (resultQuantity >= 0 ? resultQuantity.ToString() : "");
+                (resultQuantity >= 0 ? resultQuantity.ToString() : "0");
         }
 
         return new Empty();
diff --git a/contract/Forest/ForestContract_Views.cs b/contract/Forest/ForestContract_Views.cs
index 383756f..31a6089 100644
--- a/contract/Forest/ForestContract_Views.cs
+++ b/contract/Forest/ForestContract_Views.cs
@@ -129,7 +129,7 @@ public override GetTotalEffectiveListedNFTAmountOutput GetTotalEffectiveListedNF
             {
                 Symbol = input.Symbol,
                 Allowance = allowance,
-                TotalAmount = Math.Max(allowance,totalAmount)
+                TotalAmount = (allowance >= MaxApproveAllowance) ? totalAmount : Math.Max(allowance,totalAmount)
             };
         }
 
@@ -137,7 +137,7 @@ public override GetTotalEffectiveListedNFTAmountOutput GetTotalEffectiveListedNF
         {
             Symbol = input.Symbol,
             Allowance = allowance,
-            TotalAmount = long.Parse(collectionAllowance)
+            TotalAmount = (long.Parse(collectionAllowance) >= MaxApproveAllowance) ? DefaultApproveAllowance : long.Parse(collectionAllowance)
         };
         
         return getTotalEffectiveListedNftAmountOutput;