diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5c42353..82b798cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,3 @@
-2022/05/20
+2022/05/26
 
-1. 重新使用DNS over Https，解决一些地区DNS污染。
-2. 优化重连逻辑，出错时尽快恢复连接。
-3. 其它优化
\ No newline at end of file
+添加预览版语音，需要打开预览语音开关，当选择预览版语音时,如果卡住了，杀掉应用重进！！！
\ No newline at end of file
diff --git a/app/src/main/java/me/ag2s/tts/MainActivity.java b/app/src/main/java/me/ag2s/tts/MainActivity.java
index b2374828..7a6c424c 100644
--- a/app/src/main/java/me/ag2s/tts/MainActivity.java
+++ b/app/src/main/java/me/ag2s/tts/MainActivity.java
@@ -1,6 +1,7 @@
 package me.ag2s.tts;
 
 import static me.ag2s.tts.services.Constants.CUSTOM_VOICE;
+import static me.ag2s.tts.services.Constants.USE_PREVIEW;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
@@ -109,8 +110,8 @@ protected void onCreate(Bundle savedInstanceState) {
         binding.switchUseDict.setChecked(APP.getBoolean(Constants.USE_DICT, false));
         binding.switchUseDict.setOnCheckedChangeListener((buttonView, isChecked) -> APP.putBoolean(Constants.USE_DICT, isChecked));
 
-//        binding.switchUsePreview.setChecked(APP.getBoolean(Constants.USE_PREVIEW,false));
-//        binding.switchUsePreview.setOnCheckedChangeListener(((buttonView, isChecked) -> APP.putBoolean(CUSTOM_VOICE,isChecked)));
+        binding.switchUsePreview.setChecked(APP.getBoolean(Constants.USE_PREVIEW, false));
+        binding.switchUsePreview.setOnCheckedChangeListener(((buttonView, isChecked) -> APP.putBoolean(USE_PREVIEW, isChecked)));
 
 
         TtsActorAdapter actorAdapter = new TtsActorAdapter(TtsActorManger.getInstance().getActors());
@@ -151,6 +152,8 @@ protected void onCreate(Bundle savedInstanceState) {
 
         });
 
+        Toast.makeText(this, "选择预览版语音时,如果卡住了，杀掉应用重进！！！", Toast.LENGTH_LONG).show();
+
 
         if (APP.getBoolean(Constants.USE_AUTO_UPDATE, true)) {
             checkUpdate();
diff --git a/app/src/main/java/me/ag2s/tts/services/TTSService.java b/app/src/main/java/me/ag2s/tts/services/TTSService.java
index 1f52c190..74e0ea52 100644
--- a/app/src/main/java/me/ag2s/tts/services/TTSService.java
+++ b/app/src/main/java/me/ag2s/tts/services/TTSService.java
@@ -566,7 +566,7 @@ public WebSocket getOrCreateWs() {
 
                     String url;
                     String origin = Constants.EDGE_ORIGIN;
-                    if (TokenHolder.token != null) {
+                    if (TokenHolder.token != null && APP.getBoolean(Constants.USE_PREVIEW, false)) {
                         url = "wss://eastus.tts.speech.microsoft.com/cognitiveservices/websocket/v1?Authorization=bearer " + TokenHolder.token + "&X-ConnectionId=" + CommonTool.getMD5String(new Date().toString());
                         origin = "https://azure.microsoft.com";
                     } else {
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 9efde7e0..549c8788 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -39,23 +39,26 @@
 
             <Switch
                 style="?android:attr/buttonBarButtonStyle"
-                android:id="@+id/switch_use_split_sentence"
+                android:id="@+id/switch_use_dict"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:text="@string/split_sentence" />
+                android:text="@string/use_dict" />
 
             <Switch
+                android:id="@+id/switch_use_preview"
                 style="?android:attr/buttonBarButtonStyle"
-                android:id="@+id/switch_use_dict"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:text="@string/use_dict" />
-            <!--            <Switch-->
-            <!--                style="?android:attr/buttonBarButtonStyle"-->
-            <!--                android:id="@+id/switch_use_preview"-->
-            <!--                android:layout_width="wrap_content"-->
-            <!--                android:layout_height="wrap_content"-->
-            <!--                android:text="@string/use_preview" />-->
+                android:text="@string/use_preview" />
+
+            <Switch
+                style="?android:attr/buttonBarButtonStyle"
+                android:id="@+id/switch_use_split_sentence"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/split_sentence" />
+
+
         </LinearLayout>
     </HorizontalScrollView>
 
diff --git a/release/TTS_release_v0.2_202205261737.apk b/release/TTS_release_v0.2_202205261737.apk
new file mode 100644
index 00000000..1cc7afe9
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diff --git a/release/TTS_release_v0.2_202205261737.apk.idsig b/release/TTS_release_v0.2_202205261737.apk.idsig
new file mode 100644
index 00000000..fb87054f
Binary files /dev/null and b/release/TTS_release_v0.2_202205261737.apk.idsig differ