diff --git a/app/src/main/java/io/nekohasekai/sagernet/bg/VpnService.kt b/app/src/main/java/io/nekohasekai/sagernet/bg/VpnService.kt
index 5e26c955..c43b250e 100644
--- a/app/src/main/java/io/nekohasekai/sagernet/bg/VpnService.kt
+++ b/app/src/main/java/io/nekohasekai/sagernet/bg/VpnService.kt
@@ -199,9 +199,6 @@ class VpnService : BaseVpnService(),
         if (Build.VERSION.SDK_INT >= 29) builder.setMetered(metered)
         conn = builder.establish() ?: throw NullConnectionException()
 
-        // post setup
-        Libcore.setLocalResolver(LocalResolverImpl)
-
         return conn!!.fd
     }
 
@@ -217,7 +214,6 @@ class VpnService : BaseVpnService(),
     override fun onRevoke() = stopRunner()
 
     override fun onDestroy() {
-        Libcore.setLocalResolver(null)
         DataStore.vpnService = null
         super.onDestroy()
         data.binder.close()
diff --git a/app/src/main/java/moe/matsuri/nb4a/net/LocalResolverImpl.kt b/app/src/main/java/moe/matsuri/nb4a/net/LocalResolverImpl.kt
index fe59e622..27c08e31 100644
--- a/app/src/main/java/moe/matsuri/nb4a/net/LocalResolverImpl.kt
+++ b/app/src/main/java/moe/matsuri/nb4a/net/LocalResolverImpl.kt
@@ -6,87 +6,18 @@ import android.os.CancellationSignal
 import android.system.ErrnoException
 import androidx.annotation.RequiresApi
 import io.nekohasekai.sagernet.SagerNet
-import io.nekohasekai.sagernet.ktx.tryResume
 import io.nekohasekai.sagernet.ktx.tryResumeWithException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.asExecutor
 import kotlinx.coroutines.runBlocking
 import libcore.ExchangeContext
 import libcore.LocalDNSTransport
-import libcore.LocalResolver
 import java.net.InetAddress
 import java.net.UnknownHostException
 import kotlin.coroutines.resume
 import kotlin.coroutines.suspendCoroutine
 
-object LocalResolverImpl : LocalResolver, LocalDNSTransport {
-
-    // old
-
-    override fun lookupIP(network: String, domain: String): String {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-            return runBlocking {
-                suspendCoroutine { continuation ->
-                    val signal = CancellationSignal()
-                    val callback = object : DnsResolver.Callback<Collection<InetAddress>> {
-                        @Suppress("ThrowableNotThrown")
-                        override fun onAnswer(answer: Collection<InetAddress>, rcode: Int) {
-                            // libcore/v2ray.go
-                            when {
-                                answer.isNotEmpty() -> {
-                                    continuation.tryResume((answer as Collection<InetAddress?>).mapNotNull { it?.hostAddress }
-                                        .joinToString(","))
-                                }
-
-                                rcode == 0 -> {
-                                    // fuck AAAA no record
-                                    // features/dns/client.go
-                                    continuation.tryResume("")
-                                }
-
-                                else -> {
-                                    // Need return rcode
-                                    // proxy/dns/dns.go
-                                    continuation.tryResumeWithException(Exception("$rcode"))
-                                }
-                            }
-                        }
-
-                        override fun onError(error: DnsResolver.DnsException) {
-                            continuation.tryResumeWithException(error)
-                        }
-                    }
-                    val type = when {
-                        network.endsWith("4") -> DnsResolver.TYPE_A
-                        network.endsWith("6") -> DnsResolver.TYPE_AAAA
-                        else -> null
-                    }
-                    if (type != null) {
-                        DnsResolver.getInstance().query(
-                            SagerNet.underlyingNetwork,
-                            domain,
-                            type,
-                            DnsResolver.FLAG_EMPTY,
-                            Dispatchers.IO.asExecutor(),
-                            signal,
-                            callback
-                        )
-                    } else {
-                        DnsResolver.getInstance().query(
-                            SagerNet.underlyingNetwork,
-                            domain,
-                            DnsResolver.FLAG_EMPTY,
-                            Dispatchers.IO.asExecutor(),
-                            signal,
-                            callback
-                        )
-                    }
-                }
-            }
-        } else {
-            throw Exception("114514")
-        }
-    }
+object LocalResolverImpl : LocalDNSTransport {
 
     // new local
 
@@ -203,5 +134,4 @@ object LocalResolverImpl : LocalResolver, LocalDNSTransport {
         }
     }
 
-
 }
\ No newline at end of file
diff --git a/libcore/platform_java.go b/libcore/platform_java.go
index 8c782803..de014dce 100644
--- a/libcore/platform_java.go
+++ b/libcore/platform_java.go
@@ -10,16 +10,6 @@ type NB4AInterface interface {
 	Selector_OnProxySelected(selectorTag string, tag string)
 }
 
-type LocalResolver interface {
-	LookupIP(network string, domain string) (string, error)
-}
-
-var localResolver LocalResolver // Android: passed from java (only when VPNService)
-
-func SetLocalResolver(lr LocalResolver) {
-	localResolver = lr // old "underlyig://0.0.0.0"
-}
-
 type BoxPlatformInterface interface {
 	AutoDetectInterfaceControl(fd int32) error
 	OpenTun(singTunOptionsJson, tunPlatformOptionsJson string) (int, error)