diff --git a/src/main/java/me/xpyex/plugin/cnusername/bukkit/CnUsernameBK.java b/src/main/java/me/xpyex/plugin/cnusername/bukkit/CnUsernameBK.java
index 89e5044..43f6069 100644
--- a/src/main/java/me/xpyex/plugin/cnusername/bukkit/CnUsernameBK.java
+++ b/src/main/java/me/xpyex/plugin/cnusername/bukkit/CnUsernameBK.java
@@ -10,6 +10,7 @@
 import me.xpyex.module.cnusername.Logging;
 import me.xpyex.module.cnusername.UpdateChecker;
 import me.xpyex.module.cnusername.minecraft.ClassVisitorLoginListener;
+import me.xpyex.module.cnusername.mojang.ClassVisitorStringUtil;
 import me.xpyex.module.cnusername.paper.ClassVisitorCraftPlayerProfile;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
@@ -59,6 +60,7 @@ public void onLoad() {
         Logging.info("如遇Bug，或需提出建议: QQ1723275529");
 
         try {
+            // com.destroystokyo.paper.profile.CraftPlayerProfile
             //碰运气修改CraftPlayerProfile类，万一成功了()   不过大概率不行
             //这个类只在1.20.5+  ，旧版本出错无需考虑
             ClassReader reader = new ClassReader(Bukkit.class.getClassLoader().getResourceAsStream(ClassVisitorCraftPlayerProfile.CLASS_PATH + ".class"));
@@ -77,12 +79,36 @@ public void onLoad() {
                     e.printStackTrace();
                 }
             }
-        } catch (IOException e) {
+        } catch (Exception e) {
             e.printStackTrace();
             Logging.warning("修改CraftPlayerProfile类失败: " + e);
             Logging.warning("1.20.5以下的版本忽略此条，无用");
         }
 
+        try {
+            // net.minecraft.util.StringUtil
+            ClassReader reader = new ClassReader(Bukkit.class.getClassLoader().getResourceAsStream(ClassVisitorStringUtil.CLASS_PATH + ".class"));
+            String className = reader.getClassName().replace("/", ".");
+            Logging.info("开始修改类 " + className);
+            ClassWriter classWriter = new ClassWriter(reader, 0);
+            ClassVisitor classVisitor = new ClassVisitorStringUtil(className, classWriter, readPluginPattern());
+            reader.accept(classVisitor, 0);
+            loadClass(className, classWriter.toByteArray());
+            Logging.info("修改完成并保存");
+            if (CnUsername.DEBUG) {
+                try {
+                    Logging.info("Debug模式开启，保存修改后的样本以供调试");
+                    Logging.info("已保存 " + className + " 类的文件样本至: " + CnUsername.saveClassFile(classWriter, className).getPath());
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            Logging.warning("修改StringUtil类失败: " + e);
+            Logging.warning("1.20.5以下的版本忽略此条，无用");
+        }
+
         try {
             ClassReader classReader = null;
             for (String classPath : new String[]{