diff --git a/src/main/java/cc/sfclub/game/Oyster.java b/src/main/java/cc/sfclub/game/Oyster.java
index 4f3ac13..9f157b3 100644
--- a/src/main/java/cc/sfclub/game/Oyster.java
+++ b/src/main/java/cc/sfclub/game/Oyster.java
@@ -23,12 +23,14 @@
 
 import cc.sfclub.game.api.OysterAPI;
 import cc.sfclub.game.config.OysterConfig;
+import cc.sfclub.game.listeners.JoinOrLeave;
 import cc.sfclub.game.module.i18n.LocaleLoader;
 import cc.sfclub.game.task.UpdateChecker;
 import cc.sfclub.game.util.Log;
 import cc.sfclub.game.util.SimpleConfig;
 import lombok.Getter;
 import lombok.SneakyThrows;
+import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.ApiStatus;
 
@@ -82,6 +84,10 @@ public OysterConfig getOysterConfig() {
         return wrappedConfig.get();
     }
 
+    public void registerListeners() {
+        Bukkit.getPluginManager().registerEvents(new JoinOrLeave(), this);
+    }
+
     @SneakyThrows
     private void extractLangs() {
         saveResource("locale.zip", true);
diff --git a/src/main/java/cc/sfclub/game/api/OysterAPI.java b/src/main/java/cc/sfclub/game/api/OysterAPI.java
index 2f40e96..e12b9fa 100644
--- a/src/main/java/cc/sfclub/game/api/OysterAPI.java
+++ b/src/main/java/cc/sfclub/game/api/OysterAPI.java
@@ -24,9 +24,15 @@
 import cc.sfclub.game.Oyster;
 import cc.sfclub.game.managers.FlagManager;
 import cc.sfclub.game.managers.GameManager;
+import cc.sfclub.game.module.game.OysterGame;
+import cc.sfclub.game.module.player.OysterPlayer;
 import lombok.Getter;
 import org.jetbrains.annotations.ApiStatus;
 
+import java.util.Collection;
+import java.util.Optional;
+import java.util.UUID;
+
 /**
  * Oyster APIs
  */
@@ -40,4 +46,14 @@ public class OysterAPI {
     public static OysterAPI getInstance() {
         return Oyster.getPlugin(Oyster.class).getApi();
     }
+
+    /**
+     * 根据 UUID 查找到玩家
+     *
+     * @param playerUUID
+     * @return Optional\<Player\>
+     */
+    public Optional<OysterPlayer> findByPlayer(UUID playerUUID) { //todo to be optimized by caches.
+        return gameManager.getGames().map(OysterGame::getPlayers).flatMap(Collection::stream).filter(e -> e.getUniqueID().equals(playerUUID)).findFirst();
+    }
 }
diff --git a/src/main/java/cc/sfclub/game/listeners/JoinOrLeave.java b/src/main/java/cc/sfclub/game/listeners/JoinOrLeave.java
new file mode 100644
index 0000000..189bb7a
--- /dev/null
+++ b/src/main/java/cc/sfclub/game/listeners/JoinOrLeave.java
@@ -0,0 +1,40 @@
+/*
+ *
+ *     Oyster - The universal minigame framework for spigot servers.
+ *     Copyright (C) 2021 SaltedFish Club
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation; either
+ *     version 2.1 of the License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *     Lesser General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Lesser General Public
+ *     License along with this library; if not, write to the Free Software
+ *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *     USA
+ */
+
+package cc.sfclub.game.listeners;
+
+import cc.sfclub.game.api.OysterAPI;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+
+public class JoinOrLeave implements Listener {
+    @EventHandler
+    public void onLeave(PlayerQuitEvent event) {
+        OysterAPI.getInstance().findByPlayer(event.getPlayer().getUniqueId()).ifPresent(p -> p.setLastOnlineLocation(event.getPlayer().getLocation()));
+    }
+
+    @EventHandler
+    public void onJoin(PlayerJoinEvent event) {
+
+    }
+}
diff --git a/src/main/java/cc/sfclub/game/module/player/OysterPlayer.java b/src/main/java/cc/sfclub/game/module/player/OysterPlayer.java
index 182652e..6d0ee64 100644
--- a/src/main/java/cc/sfclub/game/module/player/OysterPlayer.java
+++ b/src/main/java/cc/sfclub/game/module/player/OysterPlayer.java
@@ -29,7 +29,9 @@
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NonNull;
+import lombok.Setter;
 import org.bukkit.Bukkit;
+import org.bukkit.Location;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.ApiStatus;
@@ -61,7 +63,17 @@ public class OysterPlayer extends OysterEntity<OysterPlayer> {
     private final OysterTeam team;
     @Getter(AccessLevel.PRIVATE)
     private final Set<Flag<OysterPlayer>> sortedFlags;
+    /**
+     * 获取所属的游戏
+     */
+    @Getter
     private final OysterGame game;
+    /**
+     * 上次在线位置
+     * // TODO: 23/08/2021 改良为OysterOfflinePlayerInfo & #30 Be abstractly 隐藏实现
+     */
+    @Setter
+    private Location lastOnlineLocation = null;
 
     public OysterPlayer(UUID bukkitPlayer, PlayerMechanic mechanic, OysterTeam team, OysterGame game, Collection<Flag<OysterPlayer>> flags) {
         this.bukkitPlayer = bukkitPlayer;
@@ -139,6 +151,15 @@ public Player getBukkitPlayer() {
         return Bukkit.getPlayer(bukkitPlayer);
     }
 
+    /**
+     * 获取玩家的 UUID
+     *
+     * @return
+     */
+    public UUID getUniqueID() {
+        return bukkitPlayer;
+    }
+
     @Override
     public Set<Flag<OysterPlayer>> getFlags() {
         return sortedFlags;
@@ -159,6 +180,11 @@ public void onData(GameEvent event) {
         mechanic.onData(event);
     }
 
+    @Nullable
+    public Location getLastOnlineLocation() {
+        return lastOnlineLocation;
+    }
+
     @Nullable
     @Override
     public Entity getAsEntity() {