diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index f19e24f4..9720ce76 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -2,6 +2,13 @@
 
 更新日志文档，版本顺序从新到旧，最新版本在最前(上)面。
 
+# 0.17.5
+
+## 优化
+
+- 优化标签创建逻辑
+- 其它的一些简单优化
+
 # 0.17.4
 
 ## 新特性
diff --git a/gradle.properties b/gradle.properties
index fd31ec85..8f55517b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1 @@
-version=0.17.4
+version=0.17.5
diff --git a/server/src/main/java/run/ikaros/server/core/episode/EpisodeUpdateListener.java b/server/src/main/java/run/ikaros/server/core/episode/EpisodeAttachmentUpdateEventListener.java
similarity index 79%
rename from server/src/main/java/run/ikaros/server/core/episode/EpisodeUpdateListener.java
rename to server/src/main/java/run/ikaros/server/core/episode/EpisodeAttachmentUpdateEventListener.java
index bd66ac83..c7ec7c49 100644
--- a/server/src/main/java/run/ikaros/server/core/episode/EpisodeUpdateListener.java
+++ b/server/src/main/java/run/ikaros/server/core/episode/EpisodeAttachmentUpdateEventListener.java
@@ -5,6 +5,7 @@
 import org.springframework.stereotype.Component;
 import org.thymeleaf.context.Context;
 import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
 import run.ikaros.api.infra.properties.IkarosProperties;
 import run.ikaros.api.infra.utils.StringUtils;
 import run.ikaros.server.core.attachment.event.EpisodeAttachmentUpdateEvent;
@@ -18,7 +19,7 @@
 
 @Slf4j
 @Component
-public class EpisodeUpdateListener {
+public class EpisodeAttachmentUpdateEventListener {
     private final AttachmentRepository attachmentRepository;
     private final EpisodeRepository episodeRepository;
     private final SubjectRepository subjectRepository;
@@ -30,10 +31,11 @@ public class EpisodeUpdateListener {
     /**
      * Construct.
      */
-    public EpisodeUpdateListener(AttachmentRepository attachmentRepository,
-                                 EpisodeRepository episodeRepository,
-                                 SubjectRepository subjectRepository,
-                                 NotifyService notifyService, IkarosProperties ikarosProperties) {
+    public EpisodeAttachmentUpdateEventListener(AttachmentRepository attachmentRepository,
+                                                EpisodeRepository episodeRepository,
+                                                SubjectRepository subjectRepository,
+                                                NotifyService notifyService,
+                                                IkarosProperties ikarosProperties) {
         this.attachmentRepository = attachmentRepository;
         this.episodeRepository = episodeRepository;
         this.subjectRepository = subjectRepository;
@@ -46,12 +48,14 @@ public EpisodeUpdateListener(AttachmentRepository attachmentRepository,
      */
     @EventListener(EpisodeAttachmentUpdateEvent.class)
     public Mono<Void> onEpisodeAttachmentUpdateEvent(EpisodeAttachmentUpdateEvent event) {
+        log.debug("receive episode attachment update event: {}", event);
         if (!event.getNotify()) {
             return Mono.empty();
         }
         final Long attachmentId = event.getAttachmentId();
         final Long episodeId = event.getEpisodeId();
         return Mono.just(new Context())
+            .subscribeOn(Schedulers.boundedElastic())
             .flatMap(context -> attachmentRepository.findById(attachmentId)
                 .map(entity -> {
                     context.setVariable("attachment", entity);
@@ -109,17 +113,17 @@ public Mono<Void> onEpisodeAttachmentUpdateEvent(EpisodeAttachmentUpdateEvent ev
                     return Mono.empty();
                 }
 
-                StringBuilder sb = new StringBuilder("番剧《");
-                sb.append(StringUtils.isBlank(subjectEntity.getNameCn())
-                        ? subjectEntity.getName() : subjectEntity.getNameCn())
-                    .append("》第")
-                    .append(episodeEntity.getSequence())
-                    .append("集 [")
-                    .append(StringUtils.isBlank(episodeEntity.getNameCn())
-                        ? episodeEntity.getName() : episodeEntity.getNameCn())
-                    .append("] 更新了");
+                String sb = "番剧《"
+                    + (StringUtils.isBlank(subjectEntity.getNameCn())
+                    ? subjectEntity.getName() : subjectEntity.getNameCn())
+                    + "》第"
+                    + episodeEntity.getSequence()
+                    + "集 ["
+                    + (StringUtils.isBlank(episodeEntity.getNameCn())
+                    ? episodeEntity.getName() : episodeEntity.getNameCn())
+                    + "] 更新了";
 
-                return notifyService.send(sb.toString(), "mail/anime_update", context);
+                return notifyService.send(sb, "mail/anime_update", context);
             });
     }
 }
diff --git a/server/src/main/java/run/ikaros/server/core/tag/DefaultTagService.java b/server/src/main/java/run/ikaros/server/core/tag/DefaultTagService.java
index 32f0181c..da3be7a9 100644
--- a/server/src/main/java/run/ikaros/server/core/tag/DefaultTagService.java
+++ b/server/src/main/java/run/ikaros/server/core/tag/DefaultTagService.java
@@ -94,8 +94,13 @@ public Mono<Tag> create(Tag tag) {
         Assert.notNull(tag.getType(), "'type' must not null.");
         Assert.isTrue(tag.getMasterId() >= 0, "'masterId' must >=0.");
         Assert.hasText(tag.getName(), "'name' must has text.");
-        return Mono.just(tag)
-            .flatMap(t -> copyProperties(t, new TagEntity()))
+        if (Objects.isNull(tag.getUserId())) {
+            tag.setUserId(-1L);
+        }
+        return tagRepository.existsByTypeAndMasterIdAndName(
+                tag.getType(), tag.getMasterId(), tag.getName())
+            .filter(exists -> !exists)
+            .flatMap(exists -> copyProperties(tag, new TagEntity()))
             .flatMap(tagRepository::save)
             .flatMap(tagEntity -> copyProperties(tagEntity, tag));
     }
diff --git a/server/src/main/java/run/ikaros/server/store/repository/TagRepository.java b/server/src/main/java/run/ikaros/server/store/repository/TagRepository.java
index ac695afe..ca3a54a1 100644
--- a/server/src/main/java/run/ikaros/server/store/repository/TagRepository.java
+++ b/server/src/main/java/run/ikaros/server/store/repository/TagRepository.java
@@ -1,9 +1,12 @@
 package run.ikaros.server.store.repository;
 
 import org.springframework.data.r2dbc.repository.R2dbcRepository;
+import reactor.core.publisher.Mono;
+import run.ikaros.api.store.enums.TagType;
 import run.ikaros.server.store.entity.TagEntity;
 
 public interface TagRepository
     extends R2dbcRepository<TagEntity, Long> {
 
+    Mono<Boolean> existsByTypeAndMasterIdAndName(TagType type, Long masterId, String name);
 }
diff --git a/server/src/main/resources/templates/temp/app-link-to.html b/server/src/main/resources/templates/temp/app-link-to.html
index 6b2131c6..1b59ab46 100644
--- a/server/src/main/resources/templates/temp/app-link-to.html
+++ b/server/src/main/resources/templates/temp/app-link-to.html
@@ -6,16 +6,12 @@
 </head>
 <body>
 <div style="background: #fff;">
-  <div  style="width:100%;max-width:720px;text-align: left;margin: 0 auto;padding-top: 20px;padding-bottom: 80px">
+  <div  style="width:100%;text-align: left;margin: 0 auto;padding-top: 20px;padding-bottom: 80px">
     <div style="border-radius: 5px;border:1px solid #eee;overflow: hidden;">
       <h1 style="color:#fff;background: #3798e8;font-size:24px;font-weight:normal;padding-left:40px;margin:0">
         番剧: 《<strong th:text="${subjectName}"></strong>》
       </h1>
       <div style="background:#fff;padding:20px 32px 40px;">
-        <strong>前往app观看：</strong>
-        <p style="color: #6e6e6e;font-size:13px;line-height:24px;">点击&nbsp;<a th:href="${subjectUrl}">跳转到app条目页面</a></p>
-
-        <!-- <p style="color: #6e6e6e;font-size:13px;line-height:24px;">放送进度：<span th:text="${updateEpsCount}"></span>/<span th:text="${allEpsCount}"></span></p>-->
         <h2>番剧简介：</h2>
         <p th:text="${subject.summary}" style="color: #6e6e6e;font-size:13px;line-height:24px;padding:10px 20px;background:#f8f8f8;margin:0">
         </p>
@@ -24,6 +20,9 @@ <h2>封面：</h2>
         <div align="center">
           <img style="border-radius:5px;width: 100%;" th:src="${subjectCover}" alt="URL无法访问"></img>
         </div>
+
+        <strong>前往app观看：</strong>
+        <p style="color: #6e6e6e;font-size:13px;line-height:24px;">点击&nbsp;<a th:href="${subjectUrl}">跳转到app条目页面</a></p>
       </div>
     </div>
   </div>