diff --git a/build.gradle b/build.gradle
index c0650d9..aba4dc2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,7 +40,7 @@ subprojects {
     }
 
     tasks.withType(JavaCompile) {
-        options.encoding = 'UTF-8'
+        options.setEncoding("UTF-8")
     }
 
     tasks.withType(Jar) {
@@ -50,7 +50,7 @@ subprojects {
 
     javadoc {
         options.quiet()
-        options.encoding = 'UTF-8'
+        options.setEncoding("UTF-8")
         options.jFlags("-Dfile.encoding=utf8")
         options.addStringOption('Xdoclint:none', '-quiet')
         options.links = [
diff --git a/hamster-ball-bukkit/build.gradle b/hamster-ball-bukkit/build.gradle
index e7c3c58..af46e2c 100644
--- a/hamster-ball-bukkit/build.gradle
+++ b/hamster-ball-bukkit/build.gradle
@@ -8,6 +8,7 @@ dependencies {
     compileOnly 'org.spigotmc:spigot-api:1.12.2-R0.1-SNAPSHOT'
 
     compileOnly "cn.hamster3.mc.plugin.core:bukkit:${hamster_core_version}"
+    apiShade("me.clip:placeholderapi:2.11.2") { transitive = false }
 }
 
 processResources {
diff --git a/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/HamsterBallPlugin.java b/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/HamsterBallPlugin.java
index 406daf3..15aacbc 100644
--- a/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/HamsterBallPlugin.java
+++ b/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/HamsterBallPlugin.java
@@ -1,6 +1,7 @@
 package cn.hamster3.mc.plugin.ball.bukkit;
 
 import cn.hamster3.mc.plugin.ball.bukkit.api.BallBukkitAPI;
+import cn.hamster3.mc.plugin.ball.bukkit.hook.PlaceholderHook;
 import cn.hamster3.mc.plugin.ball.bukkit.listener.BallBukkitListener;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
@@ -39,6 +40,14 @@ public class HamsterBallPlugin extends JavaPlugin {
         Bukkit.getPluginManager().registerEvents(BallBukkitListener.INSTANCE, this);
         logger.info("已注册 BallBukkitListener.");
         logger.info("HamsterBall 已启动.");
+        sync(() -> {
+            if (Bukkit.getPluginManager().isPluginEnabled("PlaceholderAPI")) {
+                PlaceholderHook.INSTANCE.register();
+                logger.info("已挂载 PlaceholderAPI 变量!");
+            } else {
+                logger.warning("服务器未安装 PlaceholderAPI, 取消挂载变量!");
+            }
+        });
     }
 
     @Override
diff --git a/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/hook/PlaceholderHook.java b/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/hook/PlaceholderHook.java
new file mode 100644
index 0000000..ce1da7d
--- /dev/null
+++ b/hamster-ball-bukkit/src/main/java/cn/hamster3/mc/plugin/ball/bukkit/hook/PlaceholderHook.java
@@ -0,0 +1,55 @@
+package cn.hamster3.mc.plugin.ball.bukkit.hook;
+
+import cn.hamster3.mc.plugin.ball.common.api.BallAPI;
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class PlaceholderHook extends PlaceholderExpansion {
+    public static final PlaceholderHook INSTANCE = new PlaceholderHook();
+
+    private PlaceholderHook() {
+    }
+
+    @Override
+    public @NotNull String getIdentifier() {
+        return "hamster_ball";
+    }
+
+    @Override
+    public @NotNull String getAuthor() {
+        return "MiniDay";
+    }
+
+    @Override
+    public @NotNull String getVersion() {
+        return "1.0.0";
+    }
+
+    @Override
+    public @Nullable String onRequest(OfflinePlayer player, @NotNull String params) {
+        switch (params) {
+            case "local_server_id": {
+                return BallAPI.getInstance().getLocalServerInfo().getId();
+            }
+            case "local_server_name": {
+                return BallAPI.getInstance().getLocalServerInfo().getName();
+            }
+            case "proxy_id": {
+                return BallAPI.getInstance().getPlayerInfo(player.getUniqueId()).getProxyServer();
+            }
+            case "proxy_name": {
+                String id = BallAPI.getInstance().getPlayerInfo(player.getUniqueId()).getProxyServer();
+                return BallAPI.getInstance().getServerInfo(id).getName();
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public @Nullable String onPlaceholderRequest(Player player, @NotNull String params) {
+        return onRequest(player, params);
+    }
+}
diff --git a/hamster-ball-bukkit/src/main/resources/plugin.yml b/hamster-ball-bukkit/src/main/resources/plugin.yml
index f5c7339..e5c4219 100644
--- a/hamster-ball-bukkit/src/main/resources/plugin.yml
+++ b/hamster-ball-bukkit/src/main/resources/plugin.yml
@@ -7,5 +7,10 @@ author: MiniDay
 website: https://github.com/MiniDay/hamster-ball
 description: 仓鼠球：一个基于 Netty 的 Minecraft 服务端通用消息中间件（原HamsterService）
 
+load: STARTUP
+
 depend:
   - HamsterCore
+
+softdepend:
+  - PlaceholderAPI
diff --git a/hamster-ball-common/build.gradle b/hamster-ball-common/build.gradle
index fda6aee..b443905 100644
--- a/hamster-ball-common/build.gradle
+++ b/hamster-ball-common/build.gradle
@@ -5,7 +5,7 @@ dependencies {
     //noinspection GradlePackageUpdate
     compileOnly 'com.google.code.gson:gson:2.8.0'
     // https://mvnrepository.com/artifact/io.netty/netty-all
-    compileOnly 'io.netty:netty-all:4.1.84.Final'
+    compileOnly 'io.netty:netty-all:4.1.82.Final'
 
     compileOnly "cn.hamster3.mc.plugin.core:common:${hamster_core_version}"
 
diff --git a/hamster-ball-server/build.gradle b/hamster-ball-server/build.gradle
index 81b5084..cf237ab 100644
--- a/hamster-ball-server/build.gradle
+++ b/hamster-ball-server/build.gradle
@@ -14,7 +14,7 @@ dependencies {
     shade 'org.apache.logging.log4j:log4j-slf4j-impl:2.19.0'
 
     // https://mvnrepository.com/artifact/io.netty/netty-all
-    implementationShade 'io.netty:netty-all:4.1.84.Final'
+    implementationShade 'io.netty:netty-all:4.1.82.Final'
     // https://mvnrepository.com/artifact/org.yaml/snakeyaml
     implementationShade 'org.yaml:snakeyaml:1.33'
     // https://mvnrepository.com/artifact/com.google.code.gson/gson