diff --git a/src/main/java/com/sakurarealm/playerrisk/PlayerRisk.java b/src/main/java/com/sakurarealm/playerrisk/PlayerRisk.java
index 312af99..451351b 100644
--- a/src/main/java/com/sakurarealm/playerrisk/PlayerRisk.java
+++ b/src/main/java/com/sakurarealm/playerrisk/PlayerRisk.java
@@ -13,6 +13,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.entity.PlayerDeathEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import java.util.*;
@@ -21,6 +22,13 @@ public final class PlayerRisk extends JavaPlugin implements Listener {
 
     PlayerRiskManager playerRiskManager = null;
 
+    //假设的方法，您需要根据实际情况来实现它
+    private String getCurrentBiome(Player player) {
+        //实现获取玩家当前所在生物群系的逻辑
+        return player.getLocation().getBlock().getBiome().name();
+    }
+
+
     public PlayerRiskManager getPlayerRiskManager() {
         if (playerRiskManager == null) {
             throw new NullPointerException("PlayerRisk plugin is not initialized.");
@@ -52,6 +60,16 @@ public final class PlayerRisk extends JavaPlugin implements Listener {
         // Plugin shutdown logic
     }
 
+    /**
+     * 玩家退出游戏后从map集合中移出
+     * @param event
+     */
+    @EventHandler
+    public void playerOffOnline(PlayerQuitEvent event){
+        Player player = event.getPlayer();
+        playerRiskManager.removePlayerLevel(player.getName());
+        getLogger().info(ChatColor.GREEN+player.getName()+"退出了游戏");
+    }
 
     /**
      * TODO: 当玩家进入城镇时, 危险度不再增加.
@@ -63,7 +81,7 @@ public final class PlayerRisk extends JavaPlugin implements Listener {
         //当玩家进入城镇后，移出map集合并且清零
         Player player = event.getPlayer();
         playerRiskManager.removePlayerLevel(player.getName());
-        throw new NotImplementedException("Not implemented yet.");
+
     }
 
     /**
@@ -76,11 +94,10 @@ public final class PlayerRisk extends JavaPlugin implements Listener {
         //当玩家离开城镇后,把玩家姓名放入mao中
         Player player = event.getPlayer();
 
-        //此处应该有一个方法，用来获取生物群系的姓名或者id,在方法中默认只有一个群系,用字符a代替
 
-        playerRiskManager.addPlayerToMap(player.getName(),"a");
+        playerRiskManager.addPlayerToMap(player.getName(),getCurrentBiome(player));
+
 
-        throw new NotImplementedException("Not implemented yet.");
     }
 
     /**
@@ -92,7 +109,7 @@ public final class PlayerRisk extends JavaPlugin implements Listener {
     public void onPlayerDeath(PlayerDeathEvent event) {
         Player player = event.getEntity();
         playerRiskManager.removePlayerLevel(player.getName());
-        throw new NotImplementedException("Not implemented yet.");
+
     }
     // TODO: Add any other event handlers needed to manage player risk.