diff --git a/mirai-core/src/main/java/net/mamoe/mirai/MiraiMain.java b/mirai-core/src/main/java/net/mamoe/mirai/MiraiMain.java
index 6f0a66781..d94cc2fc1 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/MiraiMain.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/MiraiMain.java
@@ -1,11 +1,8 @@
 package net.mamoe.mirai;
 
 
-import net.mamoe.mirai.event.MiraiEventHook;
-import net.mamoe.mirai.event.events.server.ServerDisableEvent;
-
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 public final class MiraiMain {
     private static MiraiServer server;
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 5d8ffcaf7..a8b154e60 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
@@ -3,7 +3,7 @@ package net.mamoe.mirai.contact
 /**
  * A contact is a QQ account or a QQ Group.
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 abstract class Contact(val number: Int) {
 
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 0fa154d91..cecd6001c 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
@@ -7,6 +7,10 @@ fun Int.asGroup(): Group = Instances.groups.stream().filter { t: Group? -> t?.nu
 
 fun String.withImage(id: String, type: String) = "{$id}.$type"
 
+fun String.withAt(qq: Int) = qq.asQQ().at()
+
+fun String.withAt(qq: QQ) = qq.at()
+
 object Instances {
     var qqs = arrayListOf<QQ>()
     var groups = arrayListOf<Group>()
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 58ab34b0c..0d51307a0 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
@@ -1,7 +1,7 @@
 package net.mamoe.mirai.contact
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class QQ(number: Int) : Contact(number) {
     init {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/events/robot/RobotEvents.kt b/mirai-core/src/main/java/net/mamoe/mirai/event/events/robot/RobotEvents.kt
index 65219239a..129424b72 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/event/events/robot/RobotEvents.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/events/robot/RobotEvents.kt
@@ -4,7 +4,7 @@ import net.mamoe.mirai.event.events.MiraiEvent
 import net.mamoe.mirai.network.Robot
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class RobotLoginEvent(val robot: Robot) : MiraiEvent()
 
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 69fd9cb5b..59a7c5caa 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
@@ -5,7 +5,7 @@ import java.util.*
 import java.util.stream.Collectors
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 interface Protocol {
     companion object {
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 2b6cb617a..81a9cdbc0 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
@@ -25,7 +25,7 @@ import java.net.InetSocketAddress
 /**
  * [number] is a QQ number.
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class Robot(val number: Int, private val password: String) {
     private var sequence: Int = 0
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/Packet.java b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/Packet.java
index 8c6fec9cb..e225f0c2d 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/Packet.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/Packet.java
@@ -1,7 +1,7 @@
 package net.mamoe.mirai.network.packet;
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 public interface Packet {
 
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketId.java b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketId.java
index 1619fdb51..a9e48582b 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketId.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketId.java
@@ -6,7 +6,7 @@ import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.TYPE)
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketUtil.java b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketUtil.java
index 37b60e499..3d5243f7d 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketUtil.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/PacketUtil.java
@@ -1,7 +1,7 @@
 package net.mamoe.mirai.network.packet;
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 public final class PacketUtil {
 
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 f8580e48c..50db3e66d 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
@@ -11,7 +11,7 @@ import java.net.InetAddress
 import java.security.MessageDigest
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @ExperimentalUnsignedTypes
 abstract class ClientPacket : ByteArrayDataOutputStream(), Packet {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientSendMessagePacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientSendMessagePacket.kt
index 85244ef9b..42ab6ff77 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientSendMessagePacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/ClientSendMessagePacket.kt
@@ -1,7 +1,7 @@
 package net.mamoe.mirai.network.packet.client
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @ExperimentalUnsignedTypes
 class ClientSendMessagePacket : ClientPacket() {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginPacket.kt
index d09ccfb8d..b53d026cf 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginPacket.kt
@@ -11,7 +11,7 @@ import net.mamoe.mirai.util.hexToBytes
 /**
  * Password submission (0836_622)
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @PacketId("08 36 31 03")
 @ExperimentalUnsignedTypes
@@ -120,7 +120,7 @@ class ClientLoginSucceedConfirmationPacket(
 }
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @ExperimentalUnsignedTypes
 private fun ClientPacket.writePart1(qq: Int, password: String, loginTime: Int, loginIP: String, tgtgtKey: ByteArray, token0825: ByteArray) {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginVerificationCodePacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginVerificationCodePacket.kt
index dbfbbaf4b..06d5d936f 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginVerificationCodePacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientLoginVerificationCodePacket.kt
@@ -10,7 +10,7 @@ import net.mamoe.mirai.util.ByteArrayDataOutputStream
 import net.mamoe.mirai.util.TEACryptor
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @PacketId("00 BA 31 01")
 @ExperimentalUnsignedTypes
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientServerRedirectionPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientServerRedirectionPacket.kt
index 8820241f5..dfabce150 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientServerRedirectionPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/login/ClientServerRedirectionPacket.kt
@@ -13,7 +13,7 @@ import java.io.IOException
 /**
  * Server redirection (0825 response)
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @ExperimentalUnsignedTypes
 @PacketId("08 25 31 02")
@@ -24,7 +24,7 @@ class ClientServerRedirectionPacket(private val serverIP: String, private val qq
         this.writeHex(Protocol.fixVer)
         this.writeHex(Protocol.redirectionKey)
 
-        //TEA 加密
+
         this.write(TEACryptor.encrypt(object : ClientPacket() {
             @Throws(IOException::class)
             override fun encode() {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientHeartbeatPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientHeartbeatPacket.kt
index 7c29900d7..94d8f69b6 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientHeartbeatPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientHeartbeatPacket.kt
@@ -10,7 +10,7 @@ import net.mamoe.mirai.util.TEACryptor
 import java.io.IOException
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @ExperimentalUnsignedTypes
 @PacketId("00 58")//todo check
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientTouchPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientTouchPacket.kt
index a5169fecb..25b0734d1 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientTouchPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/client/touch/ClientTouchPacket.kt
@@ -16,7 +16,7 @@ import java.io.IOException
  *
  * @see net.mamoe.mirai.network.packet.server.ServerTouchResponsePacket
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @ExperimentalUnsignedTypes
 @PacketId("08 25 31 01")
@@ -35,7 +35,7 @@ class ClientTouchPacket : ClientPacket() {
         this.writeHex(Protocol._0825key)
 
 
-        //TEA 加密
+
         this.write(TEACryptor.CRYPTOR_0825KEY.encrypt(object : ByteArrayDataOutputStream() {
             @Throws(IOException::class)
             override fun toByteArray(): ByteArray {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/ServerPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/ServerPacket.kt
index fc27b2985..16f56b5ea 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/ServerPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/ServerPacket.kt
@@ -10,7 +10,7 @@ import net.mamoe.mirai.util.toHexString
 import java.io.DataInputStream
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 abstract class ServerPacket(val input: DataInputStream) : Packet {
 
@@ -91,4 +91,33 @@ fun DataInputStream.readVarString(length:Int): String{
 }
 
 
-fun ByteArray.dataInputStream(): DataInputStream = DataInputStream(this.inputStream())
\ No newline at end of file
+fun ByteArray.dataInputStream(): DataInputStream = DataInputStream(this.inputStream())
+
+/**
+ * Reset and skip(position)
+ */
+infix fun <N : Number> DataInputStream.goto(position: N): DataInputStream {
+    this.reset()
+    this.skip(position.toLong());
+    return this
+}
+
+fun <N : Number> DataInputStream.readNBytes(position: N, length: Int): ByteArray {
+    this.goto(position)
+    return this.readNBytes(length)
+}
+
+fun <N : Number> DataInputStream.readInt(position: N): Int {
+    this.goto(position)
+    return this.readInt();
+}
+
+fun <N : Number> DataInputStream.readByte(position: N): Byte {
+    this.goto(position)
+    return this.readByte();
+}
+
+fun <N : Number> DataInputStream.readShort(position: N): Short {
+    this.goto(position)
+    return this.readShort();
+}
\ No newline at end of file
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseFailedPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseFailedPacket.kt
index 7cf34dc0a..9ace468ed 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseFailedPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseFailedPacket.kt
@@ -4,7 +4,7 @@ import net.mamoe.mirai.network.packet.server.ServerPacket
 import java.io.DataInputStream
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class ServerLoginResponseFailedPacket(val state: State, input: DataInputStream) : ServerPacket(input) {
     enum class State {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseResendPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseResendPacket.kt
index 80d084dcd..2d72644ed 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseResendPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseResendPacket.kt
@@ -5,7 +5,7 @@ import net.mamoe.mirai.network.packet.server.ServerPacket
 import java.io.DataInputStream
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 @PacketId("08 36 31 03")
 class ServerLoginResponseResendPacket(input: DataInputStream, val flag: Flag) : ServerPacket(input) {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseSuccessPacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseSuccessPacket.kt
index 41bff8951..5aea7a595 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseSuccessPacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseSuccessPacket.kt
@@ -11,8 +11,8 @@ import net.mamoe.mirai.util.toHexString
 import java.io.DataInputStream
 
 /**
- * @author Him188moe @ Mirai Project
- * @author NaturalHG @ Mirai Project
+ * @author Him188moe
+ * @author NaturalHG
  */
 class ServerLoginResponseSuccessPacket(input: DataInputStream, val packetDataLength: Int) : ServerPacket(input) {
     lateinit var _0828_rec_decr_key: ByteArray//16 bytes|
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseVerificationCodePacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseVerificationCodePacket.kt
index bca380659..9a9254f35 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseVerificationCodePacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/login/ServerLoginResponseVerificationCodePacket.kt
@@ -4,7 +4,7 @@ import net.mamoe.mirai.network.packet.server.ServerPacket
 import java.io.DataInputStream
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class ServerLoginResponseVerificationCodePacket(input: DataInputStream) : ServerPacket(input) {
     var verifyCodeLength: Int = 0
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/security/ServerSessionKeyResponsePacketEncrypted.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/security/ServerSessionKeyResponsePacketEncrypted.kt
index ac50d20fd..831968cf0 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/security/ServerSessionKeyResponsePacketEncrypted.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/security/ServerSessionKeyResponsePacketEncrypted.kt
@@ -8,7 +8,7 @@ import java.io.DataInputStream
 /**
  * Dispose_0828
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class ServerSessionKeyResponsePacket(inputStream: DataInputStream) : ServerPacket(inputStream) {
     lateinit var sessionKey: ByteArray
@@ -39,7 +39,7 @@ class ServerSessionKeyResponsePacket(inputStream: DataInputStream) : ServerPacke
 /**
  * Encrypted using []0828_rec_decr_key], decrypting in Robot
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class ServerSessionKeyResponsePacketEncrypted(inputStream: DataInputStream) : ServerPacket(inputStream) {
     override fun decode() {
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/touch/ServerTouchResponsePacket.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/touch/ServerTouchResponsePacket.kt
index 9cdcdd2ce..3dc633306 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/touch/ServerTouchResponsePacket.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/server/touch/ServerTouchResponsePacket.kt
@@ -11,7 +11,7 @@ import java.io.DataInputStream
  * @see net.mamoe.mirai.network.packet.client.login.ClientServerRedirectionPacket
  * @see net.mamoe.mirai.network.packet.client.login.ClientPasswordSubmissionPacket
  *
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 class ServerTouchResponsePacket(private val type: Type, inputStream: DataInputStream) : ServerPacket(inputStream) {
     var serverIP: String? = null;
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/util/Utils.kt b/mirai-core/src/main/java/net/mamoe/mirai/util/Utils.kt
index e92d8e9fe..8f401d8b7 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/util/Utils.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/util/Utils.kt
@@ -7,7 +7,7 @@ import java.util.*
 import java.util.zip.CRC32
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 object Utils {
     fun toHexString(byteArray: ByteArray, separator: String = " "): String = byteArray.joinToString(separator) {
diff --git a/mirai-core/src/test/java/NetworkTest.java b/mirai-core/src/test/java/NetworkTest.java
index 8fd3f5e0e..aa475522c 100644
--- a/mirai-core/src/test/java/NetworkTest.java
+++ b/mirai-core/src/test/java/NetworkTest.java
@@ -1,5 +1,5 @@
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 public class NetworkTest {
     public static void main(String[] args) {
diff --git a/mirai-native/src/main/java/net/mamoe/mirai/util/TeaEncryption.java b/mirai-native/src/main/java/net/mamoe/mirai/util/TeaEncryption.java
index f14480377..d09be5855 100644
--- a/mirai-native/src/main/java/net/mamoe/mirai/util/TeaEncryption.java
+++ b/mirai-native/src/main/java/net/mamoe/mirai/util/TeaEncryption.java
@@ -1,7 +1,7 @@
 package net.mamoe.mirai.util;
 
 /**
- * @author Him188moe @ Mirai Project
+ * @author Him188moe
  */
 public final class TeaEncryption {