diff --git a/app/build.gradle b/app/build.gradle
index 47c886b..67c7e2f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -96,11 +96,14 @@ dependencies {
 
     // 添加 Mockito 核心依赖
     testImplementation 'org.mockito:mockito-core:5.4.0'
-    
+
     // 如果需要在 Android Instrumented Tests 中使用 Mockito
     androidTestImplementation 'org.mockito:mockito-android:5.4.0'
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.mockito:mockito-inline:4.8.0'
 
+    implementation 'com.squareup.okhttp3:okhttp:4.12.0'
+    implementation 'com.squareup.okhttp3:logging-interceptor:4.12.0'
+
 }
diff --git a/app/src/main/java/com/example/retention/MainActivity.java b/app/src/main/java/com/example/retention/MainActivity.java
index 50d124a..cd5346d 100644
--- a/app/src/main/java/com/example/retention/MainActivity.java
+++ b/app/src/main/java/com/example/retention/MainActivity.java
@@ -30,6 +30,7 @@ import androidx.work.WorkManager;
 
 import com.example.retention.R;
 import com.example.retention.autoJS.AutoJsUtil;
+import com.example.retention.config.CountryCode;
 import com.example.retention.device.ArmCloudApiClient;
 import com.example.retention.device.ChangeDeviceInfoUtil;
 
@@ -211,7 +212,7 @@ public class MainActivity extends AppCompatActivity {
       ClashUtil.switchProxyWithPort(CountryCode.switchCountry());
       // ClashUtil.switchProxyGroup("PROXY", "my-socks5-proxy", "http://127.0.0.1:6170");
     } catch (Exception e) {
-      LogFileUtil.logAndWrite(Log.ERROR, TAG, "startProxyVpn: Failed to start VPN", e);
+      LogFileUtil.logAndWrite(Log.ERROR, "MainActivity", "startProxyVpn: Failed to start VPN", e);
       Toast.makeText(context, "Failed to start VPN: " +
               (e.getMessage() != null ? e.getMessage() : "Unknown error"),
           Toast.LENGTH_SHORT).show();
diff --git a/app/src/main/java/com/example/retention/config/CountryCode.java b/app/src/main/java/com/example/retention/config/CountryCode.java
new file mode 100644
index 0000000..31d8afe
--- /dev/null
+++ b/app/src/main/java/com/example/retention/config/CountryCode.java
@@ -0,0 +1,30 @@
+package com.example.retention.config;
+
+import android.util.Log;
+import com.example.retention.utils.LogFileUtil;
+
+/**
+ * @Time: 2025-08-09 21:08
+ * @Creator: 初屿贤
+ * @File: ewfw
+ * @Project: study.App
+ * @Description:
+ */
+public class CountryCode {
+    public static final int DEVICE_TYPE = 2;
+    static final String US = "US";
+    static final String RU = "RU";
+    // 默认使用美国
+    static final String DEFAULT = US;
+
+    // 当前使用的国家代码
+    public static String currentCountry = DEFAULT;
+
+    public static String switchCountry() {
+        currentCountry = currentCountry.equals(US) ?
+                RU : US;
+        LogFileUtil.logAndWrite(Log.INFO, "TAG",
+                "Switched country to: " + currentCountry, null);
+        return currentCountry;
+    }
+}
diff --git a/app/src/main/java/com/example/retention/proxy/ClashUtil.java b/app/src/main/java/com/example/retention/proxy/ClashUtil.java
index 099bdd5..690e3ed 100644
--- a/app/src/main/java/com/example/retention/proxy/ClashUtil.java
+++ b/app/src/main/java/com/example/retention/proxy/ClashUtil.java
@@ -22,6 +22,7 @@ import okhttp3.RequestBody;
 import okhttp3.Response;
 import org.json.JSONException;
 import org.json.JSONObject;
+import okhttp3.logging.HttpLoggingInterceptor;
 
 /**
  * @Time: 2025/6/9 11:13
diff --git a/app/src/main/java/com/example/retention/worker/LoadDeviceWorker.java b/app/src/main/java/com/example/retention/worker/LoadDeviceWorker.java
index 105f807..f239eb0 100644
--- a/app/src/main/java/com/example/retention/worker/LoadDeviceWorker.java
+++ b/app/src/main/java/com/example/retention/worker/LoadDeviceWorker.java
@@ -13,6 +13,7 @@ import androidx.work.WorkerParameters;
 
 import com.example.retention.MainActivity;
 import com.example.retention.autoJS.AutoJsUtil;
+import com.example.retention.config.CountryCode;
 import com.example.retention.device.ChangeDeviceInfoUtil;
 import com.example.retention.proxy.ClashUtil;
 import com.example.retention.utils.LogFileUtil;