diff --git a/src/main/java/run/halo/app/controller/core/CommonController.java b/src/main/java/run/halo/app/controller/core/CommonController.java
index bae5ee298..c56710cbd 100644
--- a/src/main/java/run/halo/app/controller/core/CommonController.java
+++ b/src/main/java/run/halo/app/controller/core/CommonController.java
@@ -57,11 +57,7 @@ public class CommonController implements ErrorController {
             }
         }
 
-        if (statusCode == 500) {
-            return "redirect:/500";
-        } else {
-            return "redirect:/404";
-        }
+        return statusCode == 500 ? "redirect:/500" : "redirect:/404";
     }
 
     /**
diff --git a/src/main/java/run/halo/app/handler/file/AliYunFileHandler.java b/src/main/java/run/halo/app/handler/file/AliYunFileHandler.java
index c2de320aa..4649b0ac6 100644
--- a/src/main/java/run/halo/app/handler/file/AliYunFileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/AliYunFileHandler.java
@@ -62,7 +62,7 @@ public class AliYunFileHandler implements FileHandler {
             // Upload
             PutObjectResult putObjectResult = ossClient.putObject(ossBucketName, upFilePath, file.getInputStream());
             if (putObjectResult == null) {
-                throw new FileOperationException("Failed to upload file " + file.getOriginalFilename() + " to AliYun " + upFilePath);
+                throw new FileOperationException("上传附件 " + file.getOriginalFilename() + " 到阿里云失败 ");
             }
 
             // Response result
diff --git a/src/main/java/run/halo/app/handler/file/LocalFileHandler.java b/src/main/java/run/halo/app/handler/file/LocalFileHandler.java
index 14cf56bb1..d81454e0a 100644
--- a/src/main/java/run/halo/app/handler/file/LocalFileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/LocalFileHandler.java
@@ -162,7 +162,7 @@ public class LocalFileHandler implements FileHandler {
             return uploadResult;
         } catch (IOException e) {
             log.error("Failed to upload file to local: " + uploadPath, e);
-            throw new ServiceException("Failed to upload file to local").setErrorData(uploadPath);
+            throw new ServiceException("上传附件失败").setErrorData(uploadPath);
         }
     }
 
diff --git a/src/main/java/run/halo/app/handler/file/QnYunFileHandler.java b/src/main/java/run/halo/app/handler/file/QnYunFileHandler.java
index 8747cf9d6..0d0d406fa 100644
--- a/src/main/java/run/halo/app/handler/file/QnYunFileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/QnYunFileHandler.java
@@ -121,7 +121,7 @@ public class QnYunFileHandler implements FileHandler {
                 log.error("QnYun error response: [{}]", ((QiniuException) e).response);
             }
 
-            throw new FileOperationException("Failed to upload file " + file.getOriginalFilename() + " to QnYun", e);
+            throw new FileOperationException("上传附件 " + file.getOriginalFilename() + " 到七牛云失败", e);
         }
     }
 
diff --git a/src/main/java/run/halo/app/handler/file/SmmsFileHandler.java b/src/main/java/run/halo/app/handler/file/SmmsFileHandler.java
index ec0fd7ab8..526abcb09 100644
--- a/src/main/java/run/halo/app/handler/file/SmmsFileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/SmmsFileHandler.java
@@ -65,7 +65,7 @@ public class SmmsFileHandler implements FileHandler {
             body.add("smfile", new HttpClientUtils.MultipartFileResource(file.getBytes(), file.getOriginalFilename()));
         } catch (IOException e) {
             log.error("Failed to get file input stream", e);
-            throw new FileOperationException("Failed to upload " + file.getOriginalFilename() + " file", e);
+            throw new FileOperationException("上传附件 " + file.getOriginalFilename() + " 到 SM.MS 失败", e);
         }
 
         body.add("ssl", false);
diff --git a/src/main/java/run/halo/app/handler/file/UpYunFileHandler.java b/src/main/java/run/halo/app/handler/file/UpYunFileHandler.java
index 2ff2b06d3..097f706e2 100644
--- a/src/main/java/run/halo/app/handler/file/UpYunFileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/UpYunFileHandler.java
@@ -91,7 +91,7 @@ public class UpYunFileHandler implements FileHandler {
 
             return uploadResult;
         } catch (Exception e) {
-            throw new FileOperationException("Failed to upload file " + file.getOriginalFilename() + " to UpYun", e);
+            throw new FileOperationException("上传附件 " + file.getOriginalFilename() + " 到又拍云失败", e);
         }
     }
 
diff --git a/src/main/java/run/halo/app/service/impl/BasePostServiceImpl.java b/src/main/java/run/halo/app/service/impl/BasePostServiceImpl.java
index bb28f1cf0..163586804 100644
--- a/src/main/java/run/halo/app/service/impl/BasePostServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/BasePostServiceImpl.java
@@ -342,7 +342,7 @@ public abstract class BasePostServiceImpl<POST extends BasePost> extends Abstrac
         }
 
         if (exist) {
-            throw new AlreadyExistsException("The post url " + post.getUrl() + " has been exist");
+            throw new AlreadyExistsException("文章路径 " + post.getUrl() + " 已存在");
         }
     }
 
diff --git a/src/main/java/run/halo/app/service/impl/CategoryServiceImpl.java b/src/main/java/run/halo/app/service/impl/CategoryServiceImpl.java
index fff4aa1cc..2b78e82a6 100644
--- a/src/main/java/run/halo/app/service/impl/CategoryServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/CategoryServiceImpl.java
@@ -53,7 +53,7 @@ public class CategoryServiceImpl extends AbstractCrudService<Category, Integer>
 
         if (count > 0) {
             log.error("Category has exist already: [{}]", category);
-            throw new AlreadyExistsException("The category has exist already");
+            throw new AlreadyExistsException("该分类已存在");
         }
 
         // Check parent id
diff --git a/src/main/java/run/halo/app/service/impl/MenuServiceImpl.java b/src/main/java/run/halo/app/service/impl/MenuServiceImpl.java
index 318fb087b..b91b8b750 100644
--- a/src/main/java/run/halo/app/service/impl/MenuServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/MenuServiceImpl.java
@@ -171,7 +171,7 @@ public class MenuServiceImpl extends AbstractCrudService<Menu, Integer> implemen
         }
 
         if (exist) {
-            throw new AlreadyExistsException("The menu name " + menu.getName() + " already exists");
+            throw new AlreadyExistsException("菜单 " + menu.getName() + " 已存在");
         }
     }
 }
diff --git a/src/main/java/run/halo/app/service/impl/TagServiceImpl.java b/src/main/java/run/halo/app/service/impl/TagServiceImpl.java
index 9b3310830..e2c49b6ad 100644
--- a/src/main/java/run/halo/app/service/impl/TagServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/TagServiceImpl.java
@@ -42,7 +42,7 @@ public class TagServiceImpl extends AbstractCrudService<Tag, Integer> implements
 
         if (count > 0) {
             // If the tag has exist already
-            throw new AlreadyExistsException("The tag has already exist").setErrorData(tag);
+            throw new AlreadyExistsException("该标签已存在").setErrorData(tag);
         }
 
         // Get tag name
diff --git a/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java b/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java
index d9f161ab0..7fb995568 100644
--- a/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java
@@ -3,12 +3,10 @@ package run.halo.app.service.impl;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.eclipse.jgit.api.Git;
-import org.eclipse.jgit.api.MergeCommand;
 import org.eclipse.jgit.api.PullResult;
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.errors.RepositoryNotFoundException;
 import org.eclipse.jgit.lib.Ref;
-import org.eclipse.jgit.merge.MergeStrategy;
 import org.eclipse.jgit.transport.RemoteConfig;
 import org.eclipse.jgit.transport.URIish;
 import org.springframework.context.ApplicationEventPublisher;
@@ -371,7 +369,7 @@ public class ThemeServiceImpl implements ThemeService {
         Assert.notNull(file, "Multipart file must not be null");
 
         if (!StringUtils.endsWithIgnoreCase(file.getOriginalFilename(), ".zip")) {
-            throw new UnsupportedMediaTypeException("Unsupported theme media type: " + file.getContentType()).setErrorData(file.getOriginalFilename());
+            throw new UnsupportedMediaTypeException("不支持的文件类型: " + file.getContentType()).setErrorData(file.getOriginalFilename());
         }
 
         ZipInputStream zis = null;
@@ -395,7 +393,7 @@ public class ThemeServiceImpl implements ThemeService {
             // Go to the base folder and add the theme into system
             return add(FileUtils.skipZipParentFolder(themeTempPath));
         } catch (IOException e) {
-            throw new ServiceException("Failed to upload theme file: " + file.getOriginalFilename(), e);
+            throw new ServiceException("上传主题失败: " + file.getOriginalFilename(), e);
         } finally {
             // Close zip input stream
             FileUtils.closeQuietly(zis);