diff --git a/mirai-api/src/main/java/net/mamoe/mirai/MiraiAPI.java b/mirai-api/src/main/java/net/mamoe/mirai/MiraiAPI.java
index b074181b7..add6345c5 100644
--- a/mirai-api/src/main/java/net/mamoe/mirai/MiraiAPI.java
+++ b/mirai-api/src/main/java/net/mamoe/mirai/MiraiAPI.java
@@ -1,6 +1,5 @@
 package net.mamoe.mirai;
 
-import java.io.PrintStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -33,10 +32,6 @@ public class MiraiAPI {
         MiraiMain.main(args);
     }
 
-    public static void setLogger(PrintStream stream){
-        MiraiServer.getInstance().getLogger().setOutPutStream(stream);
-    }
-
     public static String getMiraiVersion(){
         return MiraiServer.MIRAI_VERSION;
     }
diff --git a/mirai-core/pom.xml b/mirai-core/pom.xml
index 1d8de0d46..6b210cf6e 100644
--- a/mirai-core/pom.xml
+++ b/mirai-core/pom.xml
@@ -26,19 +26,6 @@
             <systemPath>${project.basedir}/lib/jpcap.jar</systemPath>
         </dependency>
 
-        <dependency>
-            <groupId>org.pcap4j</groupId>
-            <artifactId>pcap4j-core</artifactId>
-            <version>1.8.2</version>
-            <scope>compile</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.pcap4j</groupId>
-            <artifactId>pcap4j-packetfactory-static</artifactId>
-            <version>1.8.2</version>
-            <scope>compile</scope>
-        </dependency>
-
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
@@ -92,13 +79,6 @@
             <scope>compile</scope>
         </dependency>
 
-        <dependency>
-            <groupId>commons-httpclient</groupId>
-            <artifactId>commons-httpclient</artifactId>
-            <version>3.1</version>
-            <scope>compile</scope>
-        </dependency>
-
     </dependencies>
 
     <build>
@@ -113,19 +93,6 @@
         </resources>
 
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-jar-plugin</artifactId>
-                <configuration>
-                    <archive>
-                        <manifest>
-                            <addClasspath>true</addClasspath>
-                            <mainClass>net.mamoe.mirai.MiraiMain</mainClass>
-                        </manifest>
-                    </archive>
-                </configuration>
-            </plugin>
-
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/Bot.java b/mirai-core/src/main/java/net/mamoe/mirai/Bot.java
index 44b6b7c93..93b77a74e 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/Bot.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/Bot.java
@@ -116,10 +116,6 @@ public final class Bot implements Closeable {
         this.contacts.qqs.clear();
     }
 
-    public void addFriend(long qq) {
-
-    }
-
     /* PRIVATE */
 
     private static final AtomicInteger _id = new AtomicInteger(0);
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/BotNetworkHandlerImpl.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/BotNetworkHandlerImpl.kt
index d719ab212..68e226dc6 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/BotNetworkHandlerImpl.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/BotNetworkHandlerImpl.kt
@@ -287,6 +287,7 @@ internal class BotNetworkHandlerImpl(private val bot: Bot) : BotNetworkHandler {
 
                 is ServerLoginResponseFailedPacket -> {
                     socket.loginFuture?.complete(packet.loginState)
+                    bot.close()
                     return
                 }
 
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/Protocol.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/Protocol.kt
index 52dfe61cd..9e6b32e1b 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/Protocol.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/Protocol.kt
@@ -18,7 +18,7 @@ object Protocol {
             //add("183.60.56.29")
 
             arrayOf(
-                    //"sz3.tencent.com",
+                    "sz3.tencent.com",
                     "sz4.tencent.com",
                     "sz5.tencent.com",
                     "sz6.tencent.com",
diff --git a/mirai-core/src/test/java/BadQQFilter.kt b/mirai-core/src/test/java/BadQQFilter.kt
index a6697ee51..ba6b3c08f 100644
--- a/mirai-core/src/test/java/BadQQFilter.kt
+++ b/mirai-core/src/test/java/BadQQFilter.kt
@@ -1,10 +1,12 @@
-import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import net.mamoe.mirai.Bot
 import net.mamoe.mirai.network.packet.login.LoginState
 import net.mamoe.mirai.utils.BotAccount
 import net.mamoe.mirai.utils.Console
 import java.util.*
+import java.util.concurrent.TimeUnit
 
 /**
  * 筛选掉无法登录(冻结/设备锁/UNKNOWN)的 qq
@@ -64,28 +66,36 @@ val qqList = "2535777366----abc123456\n" +
         "2534037598----abc123456\n"
 
 
-fun main() {
+suspend fun main() {
     val goodBotList = Collections.synchronizedList(mutableListOf<Bot>())
 
-    qqList.split("\n").forEach {
-        GlobalScope.launch {
-            val strings = it.split("----")
-            val bot = Bot(BotAccount(strings[0].toLong(), strings[1].let { password ->
-                if (password.endsWith(".")) {
-                    return@let password.substring(0, password.length - 1)
-                }
-                return@let password
-            }), Console())
+    withContext(Dispatchers.Default) {
+        qqList.split("\n")
+                .filterNot { it.isEmpty() }
+                .map { it.split("----") }
+                .map { Pair(it[0].toLong(), it[1]) }
+                .forEach { (qq, password) ->
+                    launch {
+                        val bot = Bot(
+                                BotAccount(
+                                        qq,
+                                        if (password.endsWith(".")) password.substring(0, password.length - 1) else password
+                                ),
+                                Console()
+                        )
 
-            bot.network.tryLogin().whenComplete { state, _ ->
-                if (!(state == LoginState.BLOCKED || state == LoginState.DEVICE_LOCK || state == LoginState.WRONG_PASSWORD)) {
-                    goodBotList.add(bot)
+                        withContext(Dispatchers.IO) {
+                            bot.network.tryLogin().get(3, TimeUnit.MILLISECONDS)
+                        }.let { state ->
+                            if (!(state == LoginState.BLOCKED || state == LoginState.DEVICE_LOCK || state == LoginState.WRONG_PASSWORD)) {
+                                goodBotList.add(bot)
+                            } else {
+
+                            }
+                        }
+                    }
                 }
-            }
-        }
     }
 
-    Thread.sleep(9 * 3000)
-
     println(goodBotList.joinToString("\n") { it.account.qqNumber.toString() + "    " + it.account.password })
 }