diff --git a/QQWry/BinaryReaderExtensions.cs b/QQWry/BinaryReaderExtensions.cs
index 4eb0e3c..351ff57 100644
--- a/QQWry/BinaryReaderExtensions.cs
+++ b/QQWry/BinaryReaderExtensions.cs
@@ -6,7 +6,7 @@
 
 namespace QQWry
 {
-    internal static class BinaryReaderExtensions
+    public static class BinaryReaderExtensions
     {
         // Note this MODIFIES THE GIVEN ARRAY then returns a reference to the modified array.
         public static byte[] Reverse(this byte[] b)
diff --git a/QQWryTest/QQWryIpSearchTest.cs b/QQWryTest/QQWryIpSearchTest.cs
index 5793b5e..d7caec9 100644
--- a/QQWryTest/QQWryIpSearchTest.cs
+++ b/QQWryTest/QQWryIpSearchTest.cs
@@ -12,7 +12,7 @@ namespace QQWry.Test
 {
     public class QQWryIpSearchTest
     {
-        protected QQWryIpSearchMode2 GetInstance()
+        protected QQWryIpSearch GetInstance()
         {
             var dbPath = Path.Combine(AppContext.BaseDirectory, "qqwry.dat");
 
@@ -22,7 +22,7 @@ protected QQWryIpSearchMode2 GetInstance()
                 QQWryUrl = "https://github.com/JadynWong/IP_qqwry/raw/test/qqwry.rar",
                 CopyWriteUrl = "https://github.com/JadynWong/IP_qqwry/raw/test/copywrite.rar"
             };
-            QQWryIpSearchMode2 ipSearch = new QQWryIpSearchMode2(option);
+            QQWryIpSearch ipSearch = new QQWryIpSearch(option);
             return ipSearch;
         }
 
@@ -169,7 +169,7 @@ public void MultiThreadingSafeTest()
         {
             var ipSearch = GetInstance();
 
-            var maxTask = 100000;
+            var maxTask = 30000;
 
             var p = Parallel.For(0, maxTask, new ParallelOptions()
             {
diff --git a/QQWry/IpDbAccessor.cs b/Sample/Mode2/IpDbAccessor.cs
similarity index 100%
rename from QQWry/IpDbAccessor.cs
rename to Sample/Mode2/IpDbAccessor.cs
diff --git a/QQWry/QQWryIpSearchMode2.cs b/Sample/Mode2/QQWryIpSearchMode2.cs
similarity index 100%
rename from QQWry/QQWryIpSearchMode2.cs
rename to Sample/Mode2/QQWryIpSearchMode2.cs