diff --git a/app/src/main/assets/print_demo.html b/app/src/main/assets/print_demo.html
index 1cdbc09..24a48fd 100644
--- a/app/src/main/assets/print_demo.html
+++ b/app/src/main/assets/print_demo.html
@@ -92,12 +92,13 @@
     </div>
 
     <div style="margin-bottom: 20px;">
-        <div style="font-size: 13px; font-weight: bold; color: #64748b; margin-bottom: 8px;">高级业务样式</div>
+        <div style="font-size: 13px; font-weight: bold; color: #64748b; margin-bottom: 8px;">高级业务样式与测试</div>
         <div style="display: grid; grid-template-columns: 1fr 1fr; gap: 8px;">
             <button class="btn btn-orange" style="margin:0; padding:10px; font-size:13px;" onclick="callNativePrintColumns()">分栏打印测试</button>
             <button class="btn btn-orange" style="margin:0; padding:10px; font-size:13px;" onclick="callNativePrintAlarm()">警情通知单</button>
             <button class="btn btn-orange" style="margin:0; padding:10px; font-size:13px;" onclick="callNativePrintDemo(false)">2寸演示单据</button>
             <button class="btn btn-orange" style="margin:0; padding:10px; font-size:13px;" onclick="callNativePrintDemo(true)">3寸演示单据</button>
+            <button class="btn" style="margin:0; padding:10px; font-size:13px; background: #0ea5e9; grid-column: span 2;" onclick="testES6Features()">ES6 引擎特性测试</button>
         </div>
     </div>
 
@@ -460,7 +461,66 @@
         document.getElementById('aboutModal').style.display = 'none';
     }
 
-    // 安卓回调函数：退出确认时执行
+    // 打印机查纸回调
+    window.onPaperStateChanged = function(hasPaper) {
+        if (hasPaper) {
+            alert("打印机状态正常：当前有纸");
+        } else {
+            alert("⚠️ 打印机缺纸！请装入纸卷！");
+        }
+        updatePrinterStatus();
+    };
+
+    // PTT 各种事件回调
+    window.onPttEvent = function(eventType, payload) {
+        console.log("收到 PTT 事件: ", eventType, payload);
+        var msg = "";
+        switch(eventType) {
+            case 'GroupList':
+                msg = "获取群组成功，共 " + payload.length + " 个群组。第一组: " + (payload[0] ? payload[0].groupName : "无");
+                break;
+            case 'MemberList':
+                msg = "获取群成员成功，共 " + payload.length + " 个成员。";
+                break;
+            case 'SpeakerUpdate':
+                msg = "当前讲话人: " + payload.talkName + " (组:" + payload.groupName + ")";
+                break;
+            case 'PlayStatus':
+                msg = (payload.playStatus === 1 ? "开始播放:" : "结束播放:") + payload.talkName;
+                break;
+            case 'TempCall':
+                msg = "临时呼叫消息: " + payload.msg;
+                break;
+            case 'UpdateGroup':
+                msg = "进入群组: " + payload.groupName;
+                break;
+            case 'Alarm':
+                msg = "⚠️收到报警: " + payload.memberName + " (纬度:" + payload.latitude + ")";
+                break;
+            default:
+                msg = "收到事件: " + eventType;
+        }
+        showPttResult("[回调] " + msg);
+    };
+
+    // ES6 特性测试函数
+    function testES6Features() {
+        try {
+            const arr = [1, 2, 3];
+            const [a, ...rest] = arr;
+            let sum = rest.reduce((acc, val) => acc + val, 0);
+            const myMap = new Map();
+            myMap.set('key', `Sum is ${sum}`);
+            
+            new Promise((resolve) => {
+                setTimeout(() => resolve(myMap.get('key')), 100);
+            }).then(res => {
+                alert(`ES6 引擎测试成功!\n解构: a=${a}\nPromise/Map 返回: ${res}`);
+            });
+        } catch(e) {
+            alert("ES6 测试失败: " + e.message);
+        }
+    }
     function addExitText() {
         var tag = document.getElementById('inject-status');
         if (tag) {