diff --git a/src/main/java/com/atsuishio/superbwarfare/client/screens/ModSellWarningScreen.java b/src/main/java/com/atsuishio/superbwarfare/client/screens/ModSellWarningScreen.java
index 5ad125f5f..e4a7dc0b1 100644
--- a/src/main/java/com/atsuishio/superbwarfare/client/screens/ModSellWarningScreen.java
+++ b/src/main/java/com/atsuishio/superbwarfare/client/screens/ModSellWarningScreen.java
@@ -1,5 +1,6 @@
 package com.atsuishio.superbwarfare.client.screens;
 
+import com.atsuishio.superbwarfare.config.client.ModSellWarningConfig;
 import net.minecraft.ChatFormatting;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.components.Button;
@@ -46,12 +47,6 @@ public class ModSellWarningScreen extends WarningScreen {
                 "stupidNoPayWarningChecksum"            // 神秘的盐
         );
 
-        //
-//        System.out.println("env info:");
-//        environmentInfo.forEach(System.out::println);
-//        System.out.println("env info end");
-        //
-
         return sha256(String.join("|", environmentInfo));
     }
 
@@ -79,32 +74,25 @@ public class ModSellWarningScreen extends WarningScreen {
         this.lastScreen = lastScreen;
     }
 
-    // TODO 正确实现校验和配置文件
-    private static String checksumTest = "";
 
     @SubscribeEvent(priority = EventPriority.HIGH)
     public static void onGuiOpen(ScreenEvent.Opening event) {
         if (!(event.getNewScreen() instanceof JoinMultiplayerScreen && !(event.getCurrentScreen() instanceof ModSellWarningScreen)))
             return;
 
-        System.out.println("multiplayer screen open");
-
-        if (checksumTest.equals(ENVIRONMENT_CHECKSUM)) return;
-//        if (ModSellWarningConfig.ENVIRONMENT_CHECKSUM.get().equals(ENVIRONMENT_CHECKSUM)) return;
+        if (ModSellWarningConfig.ENVIRONMENT_CHECKSUM.get().equals(ENVIRONMENT_CHECKSUM)) return;
 
         // 拦截多人游戏界面加载
         event.setCanceled(true);
         Minecraft.getInstance().setScreen(new ModSellWarningScreen(event.getCurrentScreen()));
-        System.out.println(ENVIRONMENT_CHECKSUM);
     }
 
     @Override
     protected void initButtons(int pYOffset) {
         this.addRenderableWidget(Button.builder(CommonComponents.GUI_PROCEED, button -> {
             if (this.stopShowing.selected()) {
-                checksumTest = ENVIRONMENT_CHECKSUM;
-//                ModSellWarningConfig.ENVIRONMENT_CHECKSUM.set(ENVIRONMENT_CHECKSUM);
-//                ModSellWarningConfig.ENVIRONMENT_CHECKSUM.save();
+                ModSellWarningConfig.ENVIRONMENT_CHECKSUM.set(ENVIRONMENT_CHECKSUM);
+                ModSellWarningConfig.ENVIRONMENT_CHECKSUM.save();
             }
             Minecraft.getInstance().setScreen(new JoinMultiplayerScreen(this.lastScreen));
         }).bounds(this.width / 2 - 155, 100 + pYOffset, 150, 20).build());
diff --git a/src/main/java/com/atsuishio/superbwarfare/config/ClientConfig.java b/src/main/java/com/atsuishio/superbwarfare/config/ClientConfig.java
index c78d0314f..4dcffb64e 100644
--- a/src/main/java/com/atsuishio/superbwarfare/config/ClientConfig.java
+++ b/src/main/java/com/atsuishio/superbwarfare/config/ClientConfig.java
@@ -1,9 +1,6 @@
 package com.atsuishio.superbwarfare.config;
 
-import com.atsuishio.superbwarfare.config.client.DisplayConfig;
-import com.atsuishio.superbwarfare.config.client.KillMessageConfig;
-import com.atsuishio.superbwarfare.config.client.ReloadConfig;
-import com.atsuishio.superbwarfare.config.client.VehicleControlConfig;
+import com.atsuishio.superbwarfare.config.client.*;
 import net.minecraftforge.common.ForgeConfigSpec;
 
 public class ClientConfig {
@@ -15,6 +12,7 @@ public class ClientConfig {
         KillMessageConfig.init(builder);
         DisplayConfig.init(builder);
         VehicleControlConfig.init(builder);
+        ModSellWarningConfig.init(builder);
 
         return builder.build();
     }
diff --git a/src/main/java/com/atsuishio/superbwarfare/config/client/ModSellWarningConfig.java b/src/main/java/com/atsuishio/superbwarfare/config/client/ModSellWarningConfig.java
new file mode 100644
index 000000000..36d9c60b2
--- /dev/null
+++ b/src/main/java/com/atsuishio/superbwarfare/config/client/ModSellWarningConfig.java
@@ -0,0 +1,18 @@
+package com.atsuishio.superbwarfare.config.client;
+
+import net.minecraftforge.common.ForgeConfigSpec;
+
+public class ModSellWarningConfig {
+
+    public static ForgeConfigSpec.ConfigValue<String> ENVIRONMENT_CHECKSUM;
+
+    public static void init(ForgeConfigSpec.Builder builder) {
+        builder.push("checksum");
+
+        builder.comment("System environment checksum, do not edit");
+        ENVIRONMENT_CHECKSUM = builder.define("environment_checksum", "");
+
+        builder.pop();
+    }
+
+}