diff --git a/mirai-core/src/main/java/net/mamoe/mirai/MiraiServer.java b/mirai-core/src/main/java/net/mamoe/mirai/MiraiServer.java
index a69d5b861..80b40a9eb 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/MiraiServer.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/MiraiServer.java
@@ -1,7 +1,6 @@
 package net.mamoe.mirai;
 
 import lombok.Getter;
-import lombok.extern.log4j.Log4j2;
 import net.mamoe.mirai.event.MiraiEventManager;
 import net.mamoe.mirai.event.events.server.ServerDisableEvent;
 import net.mamoe.mirai.event.events.server.ServerEnableEvent;
@@ -12,7 +11,6 @@ import net.mamoe.mirai.utils.LoggerTextFormat;
 import net.mamoe.mirai.utils.MiraiLogger;
 import net.mamoe.mirai.utils.config.MiraiConfig;
 import net.mamoe.mirai.utils.config.MiraiMapSection;
-import org.apache.logging.log4j.Logger;
 
 import java.io.File;
 import java.io.IOException;
@@ -97,7 +95,7 @@ public class MiraiServer {
         });
         */
 
-        Robot robot = new Robot(1994701021L);
+        Robot robot = new Robot(1994701021);
         try {
             robot.connect(Protocol.Companion.getSERVER_IP().get(2), 8000);
         } catch (InterruptedException e) {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/contact/Contact.kt b/mirai-core/src/main/java/net/mamoe/mirai/contact/Contact.kt
index e2ec5509e..5d8ffcaf7 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/contact/Contact.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/contact/Contact.kt
@@ -5,7 +5,7 @@ package net.mamoe.mirai.contact
  *
  * @author Him188moe @ Mirai Project
  */
-abstract class Contact(val number: Long) {
+abstract class Contact(val number: Int) {
 
     /**
      * Async
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/contact/Group.kt b/mirai-core/src/main/java/net/mamoe/mirai/contact/Group.kt
index 9a025db71..b80d1f0a6 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/contact/Group.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/contact/Group.kt
@@ -1,6 +1,6 @@
 package net.mamoe.mirai.contact
 
-class Group(number: Long) : Contact(number) {
+class Group(number: Int) : Contact(number) {
     init {
         Instances.groups.add(this)
     }
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/contact/Lazy.kt b/mirai-core/src/main/java/net/mamoe/mirai/contact/Lazy.kt
index 6c87fc860..0fa154d91 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/contact/Lazy.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/contact/Lazy.kt
@@ -1,9 +1,9 @@
 package net.mamoe.mirai.contact
 
 
-fun Long.asQQ(): QQ = Instances.qqs.stream().filter { t: QQ? -> t?.number?.equals(this)!! }.findAny().orElse(QQ(this))!!
+fun Int.asQQ(): QQ = Instances.qqs.stream().filter { t: QQ? -> t?.number?.equals(this)!! }.findAny().orElse(QQ(this))!!
 
-fun Long.asGroup(): Group = Instances.groups.stream().filter { t: Group? -> t?.number?.equals(this)!! }.findAny().orElse(Group(this))!!
+fun Int.asGroup(): Group = Instances.groups.stream().filter { t: Group? -> t?.number?.equals(this)!! }.findAny().orElse(Group(this))!!
 
 fun String.withImage(id: String, type: String) = "{$id}.$type"
 
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/contact/QQ.kt b/mirai-core/src/main/java/net/mamoe/mirai/contact/QQ.kt
index 159d1b4ac..58ab34b0c 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/contact/QQ.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/contact/QQ.kt
@@ -3,7 +3,7 @@ package net.mamoe.mirai.contact
 /**
  * @author Him188moe @ Mirai Project
  */
-class QQ(number: Long) : Contact(number) {
+class QQ(number: Int) : Contact(number) {
     init {
         Instances.qqs.add(this)
     }
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/Robot.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/Robot.kt
index 5e94799e9..1be1bd194 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/Robot.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/Robot.kt
@@ -9,7 +9,6 @@ import io.netty.channel.socket.SocketChannel
 import io.netty.channel.socket.nio.NioSocketChannel
 import io.netty.handler.codec.bytes.ByteArrayDecoder
 import io.netty.handler.codec.bytes.ByteArrayEncoder
-import net.mamoe.mirai.MiraiServer
 import net.mamoe.mirai.network.packet.Packet
 import net.mamoe.mirai.network.packet.client.Client0825ResponsePacket
 import net.mamoe.mirai.network.packet.server.Server0825Packet
@@ -22,7 +21,7 @@ import java.net.InetSocketAddress
  *
  * @author Him188moe @ Mirai Project
  */
-class Robot(val number: Long) {
+class Robot(val number: Int) {
     private lateinit var ctx: ChannelHandlerContext
 
     internal fun onPacketReceived(packet: Packet) {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/Client0825ResponsePacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/Client0825ResponsePacket.kt
index 212b27d46..44c25a609 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/Client0825ResponsePacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/Client0825ResponsePacket.kt
@@ -10,7 +10,7 @@ import java.io.IOException
  * @author Him188moe @ Mirai Project
  */
 @PacketId(0x08_25_31_02)
-class Client0825ResponsePacket(private val serverIP: String, private val qq: Long) : ClientPacket() {
+class Client0825ResponsePacket(private val serverIP: String, private val qq: Int) : ClientPacket() {
     override fun encode() {
         this.writeQQ(qq)
         this.writeHex(Protocol.fixVer)
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientHeartbeatPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientHeartbeatPacket.kt
index 4799ee363..d5c07db94 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientHeartbeatPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientHeartbeatPacket.kt
@@ -8,9 +8,9 @@ import java.io.IOException
 /**
  * @author Him188moe @ Mirai Project
  */
-@PacketId(value = 0x00_58)
+@PacketId(0x00_58)
 class ClientHeartbeatPacket : ClientPacket() {
-    var qq: Long = 0
+    var qq: Int = 0
     var sessionKey: ByteArray? = null//登录后获得
 
     @Throws(IOException::class)
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientLoginPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientLoginPacket.kt
index ea362fd67..dd45b302b 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientLoginPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientLoginPacket.kt
@@ -12,10 +12,13 @@ import java.io.IOException
  */
 @PacketId(0x08_25_31_01)
 class ClientLoginPacket : ClientPacket() {
-    var qq: Long = 0
+    var qq: Int = 0
 
     @Throws(IOException::class)
     override fun encode() {
+        //println(this.toUByteArray().toHexString(" "))
+        //exitProcess(1)
+
         this.writeQQ(qq)
         this.writeHex(Protocol.fixVer)
         this.writeHex(Protocol._0825key)
@@ -51,5 +54,5 @@ fun main() {
 }
 
 
-//mirai: 02 37 13 08 25 31 01 00 00 00 00 76 E4 B8 DD 03 00 00 00 01 2E 01 00 00 68 52 00 00 00 00 A4 F1 91 88 C9 82 14 99 0C 9E 56 55 91 23 C8 3D 94 06 D9 3B 40 B5 E2 39 58 F5 E1 71 46 63 FF 6C CE 1E F1 BF CB F5 04 67 96 81 01 7C EF 47 10 15 45 8A 59 F7 B4 39 48 A3 E1 9C 74 3C DC 8E 7E 2F CF B6 C1 0C 2C C6 D6 7F DC 98 12 9C 88 35 29 33 C6 98 A9 81 C7 7B 2D 76 00 67 A1 DD 82 1E 12 04 DF DF 48 18 E0 C3 C8 54 B5 C2 16 A8 C4 CD BD 7D FD 5E 2A A9 74 68 82 44 F7 0D 7D 0E 6C 4F C8 05 03
-//epl  : 02 37 13 08 25 31 02 B8 DD 03 00 00 00 01 2E 01 00 00 68 52 00 00 00 00 A8 F2 14 5F 58 12 60 AF 07 63 97 D6 76 B2 1A 3B D9 9E E9 58 5A E5 46 0D 40 D0 A5 A2 DF 48 8D 23 FB 25 C1 1A 4B D1 27 BA AB B2 69 AB DE 91 C0 63 65 2B 3A 0F 06 0C 3F EC 5C 48 A7 AE 25 06 3F 3C 7A A2 46 91 22 8E B2 A0 41 3F 5D C8 A5 C6 64 64 62 11 A1 9E 14 51 28 39 41 01 07 B5 8B 98 33 AB 50 AD 2F 05 8E F1 17 D7 1D 67 61 1B CD E9 B8 C6 A5 A7 F9 48 F7 BE 05 BC 03
+//mirai: 02 37 13 08 25 31 01 76 E4 B8 DD 03 00 00 00 01 2E 01 00 00 68 52 00 00 00 00 A4 F1 91 88 C9 82 14 99 0C 9E 56 55 91 23 C8 3D 64 CB 62 9D 7D FE 2A 20 B6 14 B8 25 68 8A 85 D6 34 12 A6 5F C5 7D 94 EE 6F 47 CB E2 45 BF 46 7B 90 A2 F7 C0 E7 9A 73 FF 03 51 B5 2C C2 1A 66 A6 A1 DE 2D FE E2 6F 68 58 F0 C1 92 AF 00 51 60 9D 32 17 73 3E 94 EE 6C F8 CB FF 46 66 E6 9D 8D 51 8D B3 44 EE 52 5F 67 6C 23 EE 0F 04 9C 13 E5 A4 82 DE E7 80 7B 16 4B 9C 03
+//epl  : 02 37 13 08 25 31 01 B8 DD 03 00 00 00 01 2E 01 00 00 68 52 00 00 00 00 A4 F1 91 88 C9 82 14 99 0C 9E 56 55 91 23 C8 3D 37 B1 B1 62 C2 09 06 C5 FA 7B 4A 1A 77 DA BE 69 FE 03 61 3B 20 3E 99 72 33 65 D1 FA 16 03 33 DC E0 91 43 10 6D DE B7 E1 6C F8 21 A6 FA F4 A7 16 7A 7C 78 2F C1 7C 1A 1F 2A 38 68 AF 61 CE F4 0A A5 E8 BC AA 8E 4E AC FA 31 8C 70 33 DD DC FD FC 72 69 B8 FB 80 29 05 F4 61 97 E9 AD DB 89 51 D2 B1 44 A3 B2 E2 B8 89 63 03
\ No newline at end of file
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientPacket.kt
index 62442f923..3e1d80cd2 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientPacket.kt
@@ -22,7 +22,7 @@ abstract class ClientPacket : ByteArrayDataOutputStream(), Packet {
         try {
             this.writeHex(Protocol.head)
             this.writeHex(Protocol.ver)
-            writePacketId()
+            this.writePacketId()
         } catch (e: IOException) {
             throw RuntimeException(e)
         }
@@ -78,6 +78,6 @@ fun DataOutputStream.writeRandom(length: Int) {
 }
 
 @Throws(IOException::class)
-fun DataOutputStream.writeQQ(qq: Long) {
-    this.writeLong(qq)
+fun DataOutputStream.writeQQ(qq: Int) {
+    this.writeInt(qq)
 }
\ No newline at end of file