diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index e69de29..d37acde 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -0,0 +1,106 @@
+# Release Notes - NewBlackbox
+
+## Version: Latest Build (2026-01-31)
+
+---
+
+### New Features
+
+#### VPN Network Mode Toggle
+Added a new setting to choose between VPN and normal network mode for sandboxed apps.
+
+- **Location:** Settings → Others → Use VPN Network
+- **Default:** OFF (normal network mode)
+- When enabled, traffic is routed through BlackBox's VPN service
+- Requires app restart to take effect
+
+**Files Changed:**
+- `app/src/main/java/top/niunaijun/blackboxa/view/main/BlackBoxLoader.kt`
+- `app/src/main/java/top/niunaijun/blackboxa/view/setting/SettingFragment.kt`
+- `app/src/main/res/xml/setting.xml`
+- `app/src/main/res/values/strings.xml`
+- `Bcore/src/main/java/top/niunaijun/blackbox/app/configuration/ClientConfiguration.java`
+- `Bcore/src/main/java/top/niunaijun/blackbox/BlackBoxCore.java`
+
+#### Device Information Logging
+Added comprehensive device info header in logcat for easier debugging:
+- Android version, SDK level, security patch
+- Device manufacturer, brand, model, hardware
+- Supported CPU/ABIs (32-bit and 64-bit)
+- Memory info (heap usage)
+- App version and package info
+- Build fingerprint and timestamps
+
+---
+
+### Bug Fixes
+
+#### VPN Permission Fix
+**Problem:** VPN service failed to establish interface (`builder.establish()` returned null).
+
+**Root Cause:** Android requires `VpnService.prepare()` to be called from an Activity before VPN can be established.
+
+**Solution:** Added VPN permission request to `MainActivity.kt` on app launch.
+
+**Files Changed:**
+- `app/src/main/java/top/niunaijun/blackboxa/view/main/MainActivity.kt`
+
+---
+
+#### Android 10 Black Screen Fix
+**Problem:** Apps would show a black screen and timeout on Android 10 (API 29).
+
+**Root Cause:** 
+- `BRAttributionSource.getRealClass()` returns `null` on Android < 31
+- `SystemProviderStub.invoke()` crashed calling `.getName()` on null class
+- `ClassInvocationStub.injectHook()` crashed when `getWho()` returned null
+
+**Solution:**
+- Added null checks in `SystemProviderStub.java` for API version checks
+- Added null check in `ClassInvocationStub.java` to skip hooks when services don't exist
+
+**Files Changed:**
+- `Bcore/src/main/java/top/niunaijun/blackbox/fake/service/context/providers/SystemProviderStub.java`
+- `Bcore/src/main/java/top/niunaijun/blackbox/fake/hook/ClassInvocationStub.java`
+
+---
+
+### Removed Features
+
+#### Xposed Framework Support
+- Removed `BXposedManagerService` and related AIDL interfaces
+- Removed "Install Xposed Module" UI and Settings entries
+- Cleaned up Xposed-related flags and package checks
+
+---
+
+### Stability Improvements
+
+#### Anti-Detection Native Hook Stability
+- Removed `LOGD` calls from critical native hooks to prevent infinite recursion
+- Fixed syntax errors in hook implementations
+- Hooks now silently return `ENOENT` for blocked paths
+
+---
+
+### Known Issues
+
+#### Oppo/ColorOS Thermal Stats Error
+On Oppo/ColorOS devices, you may see errors like:
+```
+OppoThermalStats: PackageManager$NameNotFoundException: top.niunaijun.blackboxa:p0
+```
+**This is harmless** - it's an Oppo system bug where their thermal management incorrectly uses process names (with `:p0` suffix) instead of package names. The app works normally.
+
+---
+
+### Compatibility
+
+| Android Version | Status |
+|-----------------|--------|
+| Android 10 (Q)  | ✅ Fixed |
+| Android 11 (R)  | ✅ Supported |
+| Android 12 (S)  | ✅ Supported |
+| Android 13 (T)  | ✅ Supported |
+| Android 14 (U)  | ✅ Supported |
+| Android 15+     | ✅ Supported |
diff --git a/build.gradle b/build.gradle
index f42bd9e..a6d81b5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ ext {
 //    targetSdkVersion = 35
     minSdk = 21
     versionCode = 1
-    versionName = "3.1.0-beta"
+    versionName = "3.1.1-beta"
     xVersion = '1.1.0'
     hiddenApiBypass = '4.3'
 }
\ No newline at end of file