diff --git a/.github/ISSUE_TEMPLATE/Bug_Report.md b/.github/ISSUE_TEMPLATE/Bug_Report.md
index 939591d..ac9f6db 100644
--- a/.github/ISSUE_TEMPLATE/Bug_Report.md
+++ b/.github/ISSUE_TEMPLATE/Bug_Report.md
@@ -1,26 +1,35 @@
 ---
-name: Bug Report
-about: Use this template to feedback bugs.
+name: Bug 反馈
+about: 使用这个模板反馈应用问题。
 title: ''
 labels: bug
 assignees: ''
 
 ---
 
-## Environmental information ##
-OS(e.g: Windows 10 1909): 
-Java(e.g: Oracle Jdk 8.242): 
-Issue version(versionTag or commitId): 
+## 环境信息 ##
+系统(例如: Windows 10 1909): ``
+Java版本(例如: Oracle Jdk 8.242): ``
+<!-- 如果直接使用发布版，那么就填写发布版版本号（v开头） -->
+<!-- 如果你通过编译运行的方式运行开发版，请你填写运行所使用的Commit Id -->
+发生问题所在的版本: ``
 
-## Problem description ##
-// Describe the problem in as much detail as possible here  
+## 问题描述 ##
+<!-- 尽可能的清晰描述问题的信息 -->
 
-## Expected behavior ##
-// What will this function do under normal circumstances?  
+## 预期行为 ##
+<!-- 你觉得正常情况下应该会发生什么？ -->
 
-## Actual behavior ##
-// But what does this feature actually look like?  
+## 实际行为 ##
+<!-- 实际上这个功能做了什么？ -->
 
-## Recurrence steps ##
-// What can we do to recreate this situation?  
+## 复现步骤 ##
+<!-- 将复现步骤详细的写出，如果是偶发问题，可以写已知的，触发几率高的方法 -->
 1.
+
+## 相关信息 ##
+### 日志  ###
+<!-- 如果日志涉及了问题，请务必将日志一同提交，这对排查问题非常有用 -->
+```
+
+```
diff --git a/.github/ISSUE_TEMPLATE/Feature_Report.md b/.github/ISSUE_TEMPLATE/Feature_Report.md
new file mode 100644
index 0000000..9bc11b3
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/Feature_Report.md
@@ -0,0 +1,11 @@
+---
+name: 功能/想法 提议
+about: 使用这个模板将你对应用的想法提出来，或许我们会采纳！
+title: ''
+labels: function, question
+assignees: ''
+
+---
+
+<!-- 如果可以，尽可能的清晰、详细的表达你的想法 -->
+<!-- 没关系的，我们会进一步向你交流以尝试了解你的想法！ -->
diff --git a/Dockerfile.sample b/Dockerfile.sample
index cacbf9a..fb1aa62 100644
--- a/Dockerfile.sample
+++ b/Dockerfile.sample
@@ -5,6 +5,7 @@ ENV jarFileName=ContentGrabbingJi-exec.jar
 ENV CGJ_REDIS_URI="127.0.0.1:6379"
 ENV CGJ_PROXY=""
 RUN mkdir /data/
-CMD [java, "-Dcgj.logsPath=/data/logs", "-jar", "/CGJ.jar", "botMode", "-botDataDir=/data"]
+ENTRYPOINT ["/usr/java/openjdk-14/bin/java", "-Duser.timezone=GMT+8"]
+CMD ["-Dcgj.logsPath=/data/logs", "-jar", "/CGJ.jar", "botMode", "-botDataDir=/data"]
 
 COPY ${jarFileName} /CGJ.jar
diff --git a/README.md b/README.md
index ef5b8ee..049c69e 100644
--- a/README.md
+++ b/README.md
@@ -54,11 +54,14 @@
 你应该注意到了，在部署过程中，你需要设置一个管理员QQ的配置，色图姬支持通过命令来管理色图姬的运行。  
 目前支持的管理员命令：
 ```bash
-# 清除缓存
+# 清除缓存(慎用)
+# 该操作将会清除Redis服务器内的所有数据, 以及色图姬下载到本地的所有图片缓存.
 .cgjadmin cleanCache
 
 # 设置配置项
 # 如果不使用group参数, 则设置全局配置
+# 注意: 配置项设置后需要使用`.cgjadmin saveProperties`才会保存到文件中, 
+# 如不保存, 则仅能在本次运行中生效(或使用`.cgjadmin loadProperties`重新加载后失效).
 .cgjadmin setProperty <-key 配置项名> <-value 配置项新值> [-group 指定群组]
 
 # 查询配置项
@@ -79,7 +82,8 @@
 # 增加群组作品推送
 # 如果增加了original参数, 则图片为原图发送
 # 如果不指定group参数, 则群组为命令发送所在群组
-.cgjadmin addPushGroup [-group 指定群组号] [-minTime 最小] [-floatTime 随机时间范围] [-rankingStart 排行榜起始排名] 
+# 最长发送时间 = 最短发送时间 + 随机时间范围
+.cgjadmin addPushGroup [-group 指定群组号] [-minTime 最短发送时间] [-floatTime 随机时间范围] [-rankingStart 排行榜起始排名] 
                        [-rankingStop 排行榜结束排名] [-mode 排行榜模式] [-type 排行榜类型] [-original]
 
 # 删除群组推送功能
diff --git a/documents/interfaces/Pixiv搜索推荐候选接口.md b/documents/interfaces/Pixiv搜索推荐候选接口.md
index f59bc6f..e043215 100644
--- a/documents/interfaces/Pixiv搜索推荐候选接口.md
+++ b/documents/interfaces/Pixiv搜索推荐候选接口.md
@@ -7,9 +7,11 @@
 GET https://www.pixiv.net/rpc/cps.php?
 ```
 
-- 是否需要登录: `是`
+- 是否需要登录: `否`
 - 是否为Pixiv标准接口返回格式: `否`
-- 是否需要Referer请求头: `否`
+- 是否需要Referer请求头: `是`
+
+> 补充: Referer请求头只要是Pixiv的就可以了.
 
 ### 参数 ###
 Url参数:
diff --git a/pom.xml b/pom.xml
index efc69c6..cfbdcf2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>net.lamgc</groupId>
     <artifactId>ContentGrabbingJi</artifactId>
-    <version>2.5.2-20200630.2-SNAPSHOT</version>
+    <version>2.5.2-20200709.1-SNAPSHOT</version>
 
     <licenses>
         <license>
diff --git a/src/main/java/net/lamgc/cgj/bot/RandomIntervalSendTimer.java b/src/main/java/net/lamgc/cgj/bot/RandomIntervalSendTimer.java
index ce693ab..229e426 100644
--- a/src/main/java/net/lamgc/cgj/bot/RandomIntervalSendTimer.java
+++ b/src/main/java/net/lamgc/cgj/bot/RandomIntervalSendTimer.java
@@ -4,7 +4,6 @@ import com.google.common.base.Throwables;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.lang.reflect.Field;
 import java.util.*;
 import java.util.concurrent.atomic.AtomicBoolean;
 
@@ -23,7 +22,7 @@ public class RandomIntervalSendTimer extends TimerTask {
     private final long time;
     private final int floatTime;
     private final AtomicBoolean loop = new AtomicBoolean();
-    private final AtomicBoolean start = new AtomicBoolean();
+    private final AtomicBoolean running = new AtomicBoolean();
     private final String hashId = Integer.toHexString(this.hashCode());
 
 
@@ -88,7 +87,6 @@ public class RandomIntervalSendTimer extends TimerTask {
         this.sender = sender;
         this.time = time;
         this.floatTime = floatTime;
-        timerMap.put(timerId, this);
         if(startNow) {
             start(loop);
         }
@@ -108,21 +106,18 @@ public class RandomIntervalSendTimer extends TimerTask {
         Date nextDate = new Date();
         nextDate.setTime(nextDate.getTime() + nextDelay);
         log.info("定时器 {} 下一延迟: {}ms ({})", hashId, nextDelay, nextDate);
-        if(start.get()) {
-            try {
-                Field state = this.getClass().getSuperclass().getDeclaredField("state");
-                state.setAccessible(true);
-                state.setInt(this, 0);
-                state.setAccessible(false);
-            } catch (NoSuchFieldException | IllegalAccessException e) {
-                e.printStackTrace();
-                return;
-            }
+        if(running.get()) {
+            reset();
+            return;
         }
-        start.set(true);
+        running.set(true);
         timer.schedule(this, nextDelay);
     }
 
+    public void reset() {
+        timerMap.put(timerId, (RandomIntervalSendTimer) clone());
+    }
+
     @Override
     public void run() {
         log.info("定时器 {} 开始执行...(Sender: {}@{})", this.hashId, sender.getClass().getSimpleName(), sender.hashCode());
@@ -145,7 +140,7 @@ public class RandomIntervalSendTimer extends TimerTask {
      */
     @Override
     public boolean cancel() {
-        start.set(false);
+        running.set(false);
         loop.set(false);
         return super.cancel();
     }
@@ -158,4 +153,18 @@ public class RandomIntervalSendTimer extends TimerTask {
         timerMap.remove(this.timerId);
     }
 
+    /**
+     * 克隆一个参数完全一样的TimerTask对象.
+     * @return 返回对象不同, 参数相同的TimerTask对象.
+     */
+    @Override
+    @SuppressWarnings("MethodDoesntCallSuperMethod")
+    public Object clone() {
+        RandomIntervalSendTimer newTimerTask = new RandomIntervalSendTimer(
+                this.timerId, this.sender,
+                time, floatTime,
+                running.get(), loop.get());
+        this.destroy();
+        return newTimerTask;
+    }
 }
diff --git a/src/main/java/net/lamgc/cgj/bot/event/BotEventHandler.java b/src/main/java/net/lamgc/cgj/bot/event/BotEventHandler.java
index 8975042..cfca657 100644
--- a/src/main/java/net/lamgc/cgj/bot/event/BotEventHandler.java
+++ b/src/main/java/net/lamgc/cgj/bot/event/BotEventHandler.java
@@ -26,7 +26,6 @@ import java.text.SimpleDateFormat;
 import java.util.*;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -40,15 +39,13 @@ public class BotEventHandler implements EventHandler {
 
     private final static Logger log = LoggerFactory.getLogger(BotEventHandler.class);
 
-    private final static Map<Long, AtomicBoolean> muteStateMap = new Hashtable<>();
-
     /**
      * 消息事件执行器
      */
     private final static EventExecutor executor = new EventExecutor(new TimeLimitThreadPoolExecutor(
-            180000, // 3minThr
-            Math.max(Runtime.getRuntime().availableProcessors(), 4),
-            Math.min(Math.max(Runtime.getRuntime().availableProcessors(), 4), 32),
+            180000, // 3min limit
+            Math.max(Runtime.getRuntime().availableProcessors(), 4), // 4 ~ processors
+            Math.min(Math.max(Runtime.getRuntime().availableProcessors() * 2, 8), 32),// (8 ~ processors * 2) ~ 32
             30L,
             TimeUnit.SECONDS,
             new LinkedBlockingQueue<>(1536),
@@ -167,9 +164,6 @@ public class BotEventHandler implements EventHandler {
         log.debug(event.toString());
         if(mismatch(msg)) {
             return;
-        } else if(isMute(event.getFromGroup())) {
-            log.debug("机器人已被禁言, 忽略请求.");
-            return;
         }
 
         Pattern pattern = Pattern.compile("/\\s*(\".+?\"|[^:\\s])+((\\s*:\\s*(\".+?\"|[^\\s])+)|)|(\".+?\"|[^\"\\s])+");
@@ -236,7 +230,7 @@ public class BotEventHandler implements EventHandler {
             }
         }
         long processTime = System.currentTimeMillis() - time;
-        if(!Objects.isNull(result) && result instanceof String && !isMute(event.getFromGroup())) {
+        if(!Objects.isNull(result) && result instanceof String) {
             try {
                 int sendResult = event.sendMessage((String) result);
                 if (sendResult < 0) {
@@ -248,8 +242,6 @@ public class BotEventHandler implements EventHandler {
             } catch (Exception e) {
                 log.error("发送消息时发生异常", e);
             }
-        } else if(isMute(event.getFromGroup())) {
-            log.warn("命令反馈时机器人已被禁言, 跳过反馈.");
         }
         long totalTime = System.currentTimeMillis() - time;
         log.info("命令反馈完成.(事件耗时: {}ms, P: {}%({}ms), R: {}%({}ms))", totalTime,
@@ -266,45 +258,4 @@ public class BotEventHandler implements EventHandler {
         return !message.startsWith(COMMAND_PREFIX) && !message.startsWith(ADMIN_COMMAND_PREFIX);
     }
 
-    /**
-     * 查询某群组中Bot是否被禁言
-     * @param groupId 待查询的群组号
-     * @return 如果被禁言, 返回true, 如果未被禁言或禁言情况未知, 返回false
-     */
-    private static boolean isMute(long groupId) {
-        Boolean mute = isMute(groupId, false);
-        return mute != null && mute;
-    }
-
-    /**
-     * 查询某群是否被禁言.
-     * @param groupId 群组Id
-     * @param rawValue 是否返回原始值(当没有该群状态, 且本参数为true时, 将返回null)
-     * @return 返回状态值, 如无该群禁言记录且rawValue = true, 则返回null
-     */
-    public static Boolean isMute(long groupId, boolean rawValue) {
-        if(groupId <= 0) {
-            return false;
-        }
-        AtomicBoolean state = muteStateMap.get(groupId);
-        if(state == null && rawValue) {
-            return null;
-        }
-        return state != null && state.get();
-    }
-
-    /**
-     * 设置机器人禁言状态.
-     * <p>设置该项可防止因机器人在禁言期间反馈请求导致被封号.</p>
-     * @param mute 如果被禁言, 传入true
-     */
-    public static void setMuteState(long groupId, boolean mute) {
-        if(!muteStateMap.containsKey(groupId)) {
-            muteStateMap.put(groupId, new AtomicBoolean(mute));
-        } else {
-            muteStateMap.get(groupId).set(mute);
-        }
-        log.warn("群组 {} 机器人禁言状态已变更: {}", groupId, mute ? "已禁言" : "已解除");
-    }
-
 }
diff --git a/src/main/java/net/lamgc/cgj/bot/event/MessageEvent.java b/src/main/java/net/lamgc/cgj/bot/event/MessageEvent.java
index f27cdac..0abb79b 100644
--- a/src/main/java/net/lamgc/cgj/bot/event/MessageEvent.java
+++ b/src/main/java/net/lamgc/cgj/bot/event/MessageEvent.java
@@ -57,7 +57,7 @@ public abstract class MessageEvent implements EventObject, MessageSender {
 
     @Override
     public String toString() {
-        return this.getClass().getSimpleName() + "@" + this.hashCode() + "{" +
+        return this.getClass().getSimpleName() + "@" + Integer.toHexString(this.hashCode()) + "{" +
                 "fromGroup=" + getFromGroup() +
                 ", fromQQ=" + getFromQQ() +
                 ", message='" + getMessage() + '\'' +
diff --git a/src/main/java/net/lamgc/cgj/bot/framework/coolq/CQPluginMain.java b/src/main/java/net/lamgc/cgj/bot/framework/coolq/CQPluginMain.java
index d9122cd..28c43b1 100644
--- a/src/main/java/net/lamgc/cgj/bot/framework/coolq/CQPluginMain.java
+++ b/src/main/java/net/lamgc/cgj/bot/framework/coolq/CQPluginMain.java
@@ -17,12 +17,12 @@ import org.springframework.stereotype.Component;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 @Component
+@SuppressWarnings("unused")
 public class CQPluginMain extends CQPlugin implements EventHandler {
 
     private final static AtomicBoolean initialState = new AtomicBoolean();
 
     public CQPluginMain() {
-
         LoggerFactory.getLogger(CQPluginMain.class)
                 .info("BotEventHandler.COMMAND_PREFIX = {}", BotEventHandler.COMMAND_PREFIX);
     }
diff --git a/src/main/java/net/lamgc/cgj/bot/framework/mirai/MiraiMain.java b/src/main/java/net/lamgc/cgj/bot/framework/mirai/MiraiMain.java
index 8cb8bd1..a5f1833 100644
--- a/src/main/java/net/lamgc/cgj/bot/framework/mirai/MiraiMain.java
+++ b/src/main/java/net/lamgc/cgj/bot/framework/mirai/MiraiMain.java
@@ -8,6 +8,7 @@ import net.lamgc.cgj.bot.framework.FrameworkResources;
 import net.lamgc.cgj.bot.framework.mirai.message.MiraiMessageEvent;
 import net.lamgc.cgj.bot.framework.mirai.message.MiraiMessageSenderFactory;
 import net.lamgc.cgj.bot.message.MessageSenderBuilder;
+import net.lamgc.cgj.bot.util.GroupMuteManager;
 import net.mamoe.mirai.Bot;
 import net.mamoe.mirai.BotFactoryJvm;
 import net.mamoe.mirai.event.events.BotMuteEvent;
@@ -32,7 +33,9 @@ public class MiraiMain implements Framework {
 
     private Bot bot;
 
-    private final static Properties botProperties = new Properties();
+    private final Properties botProperties = new Properties();
+
+    private final GroupMuteManager muteManager = new GroupMuteManager();
 
     @Override
     public void init(FrameworkResources resources) {
@@ -77,9 +80,9 @@ public class MiraiMain implements Framework {
         Events.subscribeAlways(FriendMessageEvent.class, this::executeMessageEvent);
         Events.subscribeAlways(TempMessageEvent.class, this::executeMessageEvent);
         Events.subscribeAlways(BotMuteEvent.class,
-                event -> BotEventHandler.setMuteState(event.getGroup().getId(), true));
+                event -> muteManager.setMuteState(event.getGroup().getId(), true));
         Events.subscribeAlways(BotUnmuteEvent.class,
-                event -> BotEventHandler.setMuteState(event.getGroup().getId(), false));
+                event -> muteManager.setMuteState(event.getGroup().getId(), false));
         bot.login();
         MessageSenderBuilder.setCurrentMessageSenderFactory(new MiraiMessageSenderFactory(bot));
         ApplicationBoot.initialBot();
@@ -100,9 +103,12 @@ public class MiraiMain implements Framework {
         log.debug("Mirai Message: {}", message);
         if(message instanceof GroupMessageEvent) {
             GroupMessageEvent GroupMessageEvent = (GroupMessageEvent) message;
-            if(BotEventHandler.isMute(GroupMessageEvent.getGroup().getId(), true) == null) {
-                BotEventHandler.setMuteState(GroupMessageEvent.getGroup().getId(),
+            Boolean muteState = muteManager.isMute(GroupMessageEvent.getGroup().getId(), true);
+            if(muteState == null) {
+                muteManager.setMuteState(GroupMessageEvent.getGroup().getId(),
                         ((GroupMessageEvent) message).getGroup().getBotMuteRemaining() != 0);
+            } else if(muteState) {
+                return;
             }
         }
         BotEventHandler.executeMessageEvent(MiraiMessageEvent.covertEventObject(message));
diff --git a/src/main/java/net/lamgc/cgj/bot/util/GroupMuteManager.java b/src/main/java/net/lamgc/cgj/bot/util/GroupMuteManager.java
new file mode 100644
index 0000000..6193839
--- /dev/null
+++ b/src/main/java/net/lamgc/cgj/bot/util/GroupMuteManager.java
@@ -0,0 +1,48 @@
+package net.lamgc.cgj.bot.util;
+
+import java.util.Hashtable;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * 群禁言管理器.
+ * <p>该管理器用于存取群组禁言状态.</p>
+ */
+public class GroupMuteManager {
+
+    private final Map<Long, AtomicBoolean> muteStateMap = new Hashtable<>();
+
+    /**
+     * 查询某群是否被禁言.
+     * @param groupId 群组Id
+     * @param rawValue 是否返回原始值(当没有该群状态, 且本参数为true时, 将返回null)
+     * @return 返回状态值, 如无该群禁言记录且rawValue = true, 则返回null
+     */
+    public Boolean isMute(long groupId, boolean rawValue) {
+        if(groupId <= 0) {
+            return false;
+        }
+        AtomicBoolean state = muteStateMap.get(groupId);
+        if(state == null && rawValue) {
+            return null;
+        }
+        return state != null && state.get();
+    }
+
+    /**
+     * 设置机器人禁言状态.
+     * <p>设置该项可防止因机器人在禁言期间反馈请求导致被封号.</p>
+     * @param mute 如果被禁言, 传入true
+     */
+    public void setMuteState(long groupId, boolean mute) {
+        if(groupId <= 0) {
+            return;
+        }
+        if(!muteStateMap.containsKey(groupId)) {
+            muteStateMap.put(groupId, new AtomicBoolean(mute));
+        } else {
+            muteStateMap.get(groupId).set(mute);
+        }
+    }
+
+}
diff --git a/src/main/java/net/lamgc/cgj/pixiv/PixivDownload.java b/src/main/java/net/lamgc/cgj/pixiv/PixivDownload.java
index 7c0f6df..a113c87 100644
--- a/src/main/java/net/lamgc/cgj/pixiv/PixivDownload.java
+++ b/src/main/java/net/lamgc/cgj/pixiv/PixivDownload.java
@@ -402,7 +402,7 @@ public class PixivDownload {
         if(resultObject.get("error").getAsBoolean()) {
             String message = resultObject.get("message").getAsString();
             log.warn("作品页面接口请求错误, 错误信息: {}", message);
-            throw new HttpRequestException(response);
+            throw new HttpRequestException(response.getStatusLine(), resultObject.toString());
         }
 
         JsonArray linkArray = resultObject.getAsJsonArray("body");
diff --git a/src/main/java/net/lamgc/cgj/pixiv/PixivUgoiraBuilder.java b/src/main/java/net/lamgc/cgj/pixiv/PixivUgoiraBuilder.java
index 5bc321e..73efdb7 100644
--- a/src/main/java/net/lamgc/cgj/pixiv/PixivUgoiraBuilder.java
+++ b/src/main/java/net/lamgc/cgj/pixiv/PixivUgoiraBuilder.java
@@ -1,5 +1,6 @@
 package net.lamgc.cgj.pixiv;
 
+import com.google.common.io.ByteStreams;
 import com.google.gson.Gson;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
@@ -12,7 +13,6 @@ import org.apache.http.HttpResponse;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.util.EntityUtils;
-import org.apache.tomcat.util.http.fileupload.util.Streams;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -127,14 +127,13 @@ public final class PixivUgoiraBuilder {
         HashMap<String, InputStream> frameMap = new HashMap<>(frames.size());
         while((entry = zipInputStream.getNextEntry()) != null) {
             log.trace("ZipEntry {} 正在接收...", entry);
-            Streams.copy(zipInputStream, cacheOutputStream, false);
+            ByteStreams.copy(zipInputStream, cacheOutputStream);
             frameMap.put(entry.getName(), new ByteArrayInputStream(cacheOutputStream.toByteArray()));
             log.trace("ZipEntry {} 已接收完成.", entry);
             cacheOutputStream.reset();
         }
 
-
-        InputStream firstFrameInput = frameMap.get("000000.jpg");
+        InputStream firstFrameInput = frameMap.get(frames.get(0).getAsJsonObject().get("file").getAsString());
         BufferedImage firstFrame = ImageIO.read(firstFrameInput);
         firstFrameInput.reset();
         if(width != firstFrame.getWidth() || height != firstFrame.getHeight()) {
diff --git a/src/test/java/net/lamgc/cgj/bot/util/GroupMuteManagerTest.java b/src/test/java/net/lamgc/cgj/bot/util/GroupMuteManagerTest.java
new file mode 100644
index 0000000..3a04325
--- /dev/null
+++ b/src/test/java/net/lamgc/cgj/bot/util/GroupMuteManagerTest.java
@@ -0,0 +1,30 @@
+package net.lamgc.cgj.bot.util;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class GroupMuteManagerTest {
+
+    @Test
+    public void muteStateTest() {
+        GroupMuteManager manager = new GroupMuteManager();
+        Assert.assertNull(manager.isMute(1, true)); // 未设置的群组返回null
+        Assert.assertFalse(manager.isMute(1, false)); // 未设置就返回false
+        manager.setMuteState(1, true); // mute == true
+        Assert.assertNotNull(manager.isMute(1, true)); // 第一次设置后不为null
+        Assert.assertTrue(manager.isMute(1, false)); // 确保条件正常
+        manager.setMuteState(2, true); // 不能出现不同群号的冲突
+        manager.setMuteState(1, false);
+        Assert.assertTrue(manager.isMute(2, false));
+        Assert.assertNotNull(manager.isMute(1, true)); // 变更为false后依然不能返回null
+        Assert.assertFalse(manager.isMute(1, false));
+    }
+
+    @Test
+    public void invalidGroupIdTest() {
+        GroupMuteManager manager = new GroupMuteManager();
+        manager.setMuteState(-1, true); // 设置应该是无效的
+        Assert.assertFalse(manager.isMute(-1, false)); // 由于设置无效, 返回false即可
+    }
+
+}