diff --git a/src/main/java/cc/ryanc/halo/model/dto/post/PostSimpleOutputDTO.java b/src/main/java/cc/ryanc/halo/model/dto/post/PostSimpleOutputDTO.java
index f8758e478..51e2fed80 100644
--- a/src/main/java/cc/ryanc/halo/model/dto/post/PostSimpleOutputDTO.java
+++ b/src/main/java/cc/ryanc/halo/model/dto/post/PostSimpleOutputDTO.java
@@ -46,11 +46,6 @@ public class PostSimpleOutputDTO extends PostMinimalOutputDTO {
      */
     private Boolean disallowComment;
 
-    /**
-     * 文章密码
-     */
-    private String password;
-
     /**
      * 自定义渲染模板名称
      */
diff --git a/src/main/java/cc/ryanc/halo/model/entity/Post.java b/src/main/java/cc/ryanc/halo/model/entity/Post.java
index 9f34596e9..34f65ff2b 100644
--- a/src/main/java/cc/ryanc/halo/model/entity/Post.java
+++ b/src/main/java/cc/ryanc/halo/model/entity/Post.java
@@ -134,6 +134,7 @@ public class Post extends BaseEntity {
     public void prePersist() {
         super.prePersist();
         id = null;
+        editTime = getCreateTime();
     }
 
 }
diff --git a/src/main/java/cc/ryanc/halo/repository/PostCategoryRepository.java b/src/main/java/cc/ryanc/halo/repository/PostCategoryRepository.java
index 70c1c6ef7..9ed98f8e2 100644
--- a/src/main/java/cc/ryanc/halo/repository/PostCategoryRepository.java
+++ b/src/main/java/cc/ryanc/halo/repository/PostCategoryRepository.java
@@ -5,7 +5,6 @@ import cc.ryanc.halo.repository.base.BaseRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.lang.NonNull;
 
-import java.util.Collection;
 import java.util.List;
 import java.util.Set;
 
@@ -50,8 +49,17 @@ public interface PostCategoryRepository extends BaseRepository<PostCategory, Int
      * Finds all post categories by post id.
      *
      * @param postId post id must not be null
-     * @return a list of post categories
+     * @return a list of post category
      */
     @NonNull
     List<PostCategory> findAllByPostId(@NonNull Integer postId);
+
+    /**
+     * Finds all post categories by category id.
+     *
+     * @param categoryId category id must not be null
+     * @return a list of post category
+     */
+    @NonNull
+    List<PostCategory> findAllByCategoryId(@NonNull Integer categoryId);
 }
diff --git a/src/main/java/cc/ryanc/halo/service/PostCategoryService.java b/src/main/java/cc/ryanc/halo/service/PostCategoryService.java
index 0fddc67d8..58ad8d541 100644
--- a/src/main/java/cc/ryanc/halo/service/PostCategoryService.java
+++ b/src/main/java/cc/ryanc/halo/service/PostCategoryService.java
@@ -55,4 +55,31 @@ public interface PostCategoryService extends CrudService<PostCategory, Integer>
      */
     @NonNull
     List<PostCategory> mergeOrCreateByIfAbsent(@NonNull Integer postId, Set<Integer> categoryIds);
+
+    /**
+     * Lists by post id.
+     *
+     * @param postId post id must not be null
+     * @return a list of post category
+     */
+    @NonNull
+    List<PostCategory> listByPostId(@NonNull Integer postId);
+
+    /**
+     * Lists by category id.
+     *
+     * @param categoryId category id must not be null
+     * @return a list of post category
+     */
+    @NonNull
+    List<PostCategory> listByCategoryId(@NonNull Integer categoryId);
+
+    /**
+     * List category id set by post id.
+     *
+     * @param postId post id must not be null
+     * @return a set of category id
+     */
+    @NonNull
+    Set<Integer> listCategoryIdsByPostId(@NonNull Integer postId);
 }
diff --git a/src/main/java/cc/ryanc/halo/service/PostTagService.java b/src/main/java/cc/ryanc/halo/service/PostTagService.java
index 1736ec7e2..75bf25e3a 100644
--- a/src/main/java/cc/ryanc/halo/service/PostTagService.java
+++ b/src/main/java/cc/ryanc/halo/service/PostTagService.java
@@ -66,4 +66,31 @@ public interface PostTagService extends CrudService<PostTag, Integer> {
      */
     @NonNull
     List<PostTag> mergeOrCreateByIfAbsent(@NonNull Integer postId, Set<Integer> tagIds);
+
+    /**
+     * Lists post tags by post id.
+     *
+     * @param postId post id must not be null
+     * @return a list of post tag
+     */
+    @NonNull
+    List<PostTag> listByPostId(@NonNull Integer postId);
+
+    /**
+     * Lists post tags by tag id.
+     *
+     * @param tagId tag id must not be null
+     * @return a list of post tag
+     */
+    @NonNull
+    List<PostTag> listByTagId(@NonNull Integer tagId);
+
+    /**
+     * Lists tag id set by post id.
+     *
+     * @param postId post id must not be null
+     * @return a set of tag id
+     */
+    @NonNull
+    Set<Integer> listTagIdsByPostId(@NonNull Integer postId);
 }
diff --git a/src/main/java/cc/ryanc/halo/service/impl/PostCategoryServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/PostCategoryServiceImpl.java
index 90017515f..1ff9f9a68 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/PostCategoryServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/PostCategoryServiceImpl.java
@@ -133,4 +133,25 @@ public class PostCategoryServiceImpl extends AbstractCrudService<PostCategory, I
         // Create them
         return postCategories;
     }
+
+    @Override
+    public List<PostCategory> listByPostId(Integer postId) {
+        Assert.notNull(postId, "Post id must not be null");
+
+        return postCategoryRepository.findAllByPostId(postId);
+    }
+
+    @Override
+    public List<PostCategory> listByCategoryId(Integer categoryId) {
+        Assert.notNull(categoryId, "Category id must not be null");
+
+        return postCategoryRepository.findAllByCategoryId(categoryId);
+    }
+
+    @Override
+    public Set<Integer> listCategoryIdsByPostId(Integer postId) {
+        Assert.notNull(postId, "Post id must not be null");
+
+        return postCategoryRepository.findAllCategoryIdsByPostId(postId);
+    }
 }
diff --git a/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java
index 77abb001d..75263c4b1 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java
@@ -14,6 +14,7 @@ import cc.ryanc.halo.model.vo.PostListVO;
 import cc.ryanc.halo.repository.PostRepository;
 import cc.ryanc.halo.service.*;
 import cc.ryanc.halo.service.base.AbstractCrudService;
+import cc.ryanc.halo.utils.DateUtils;
 import cc.ryanc.halo.utils.MarkdownUtils;
 import cc.ryanc.halo.utils.ServiceUtils;
 import lombok.extern.slf4j.Slf4j;
@@ -25,10 +26,12 @@ import org.springframework.lang.NonNull;
 import org.springframework.stereotype.Service;
 import org.springframework.util.Assert;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Function;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
 /**
@@ -175,6 +178,9 @@ public class PostServiceImpl extends AbstractCrudService<Post, Integer> implemen
 
     @Override
     public PostDetailVO updateBy(Post postToUpdate, Set<Integer> tagIds, Set<Integer> categoryIds) {
+        // Set edit time
+        postToUpdate.setEditTime(DateUtils.now());
+
         return createOrUpdate(postToUpdate, tagIds, categoryIds, this::update);
     }
 
@@ -211,14 +217,10 @@ public class PostServiceImpl extends AbstractCrudService<Post, Integer> implemen
 
         log.debug("Created post categories: [{}]", postCategories);
 
-        // Build post detail vo
-        PostDetailVO postDetailVO = new PostDetailVO().convertFrom(post);
-
-        postDetailVO.setTagIds(ServiceUtils.fetchProperty(postTags, PostTag::getTagId));
-
-        postDetailVO.setCategoryIds(ServiceUtils.fetchProperty(postCategories, PostCategory::getCategoryId));
-
-        return postDetailVO;
+        // Convert to post detail vo
+        return convertTo(post,
+                () -> ServiceUtils.fetchProperty(postTags, PostTag::getTagId),
+                () -> ServiceUtils.fetchProperty(postCategories, PostCategory::getCategoryId));
     }
 
     /**
@@ -235,6 +237,47 @@ public class PostServiceImpl extends AbstractCrudService<Post, Integer> implemen
 
     @Override
     public PostDetailVO getDetailVoBy(Integer postId) {
-        return null;
+        Assert.notNull(postId, "post id must not be null");
+
+        Post post = getById(postId);
+
+        // Convert to post detail vo
+        return convertTo(post);
+    }
+
+    /**
+     * Convert to post detail vo.
+     *
+     * @param post post must not be null
+     * @return post detail vo
+     */
+    @NonNull
+    private PostDetailVO convertTo(@NonNull Post post) {
+        return convertTo(post,
+                () -> postTagService.listTagIdsByPostId(post.getId()),
+                () -> postCategoryService.listCategoryIdsByPostId(post.getId()));
+    }
+
+    /**
+     * Convert to post detail vo.
+     *
+     * @param post                  post must not be null
+     * @param tagIdSetSupplier      tag id set supplier
+     * @param categoryIdSetSupplier category id set supplier
+     * @return post detail vo
+     */
+    @NonNull
+    private PostDetailVO convertTo(@NonNull Post post, Supplier<Set<Integer>> tagIdSetSupplier, Supplier<Set<Integer>> categoryIdSetSupplier) {
+        Assert.notNull(post, "Post must not be null");
+
+        PostDetailVO postDetailVO = new PostDetailVO().convertFrom(post);
+
+        // Get post tag ids
+        postDetailVO.setTagIds(tagIdSetSupplier == null ? Collections.emptySet() : tagIdSetSupplier.get());
+
+        // Get post category ids
+        postDetailVO.setCategoryIds(categoryIdSetSupplier == null ? Collections.emptySet() : categoryIdSetSupplier.get());
+
+        return postDetailVO;
     }
 }
diff --git a/src/main/java/cc/ryanc/halo/service/impl/PostTagServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/PostTagServiceImpl.java
index e72a96fcd..f8e03be14 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/PostTagServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/PostTagServiceImpl.java
@@ -149,4 +149,25 @@ public class PostTagServiceImpl extends AbstractCrudService<PostTag, Integer> im
         // Return post tags
         return postTags;
     }
+
+    @Override
+    public List<PostTag> listByPostId(Integer postId) {
+        Assert.notNull(postId, "Post id must not be null");
+
+        return postTagRepository.findAllByPostId(postId);
+    }
+
+    @Override
+    public List<PostTag> listByTagId(Integer tagId) {
+        Assert.notNull(tagId, "Tag id must not be null");
+
+        return postTagRepository.findAllByTagId(tagId);
+    }
+
+    @Override
+    public Set<Integer> listTagIdsByPostId(Integer postId) {
+        Assert.notNull(postId, "Post id must not be null");
+
+        return postTagRepository.findAllTagIdsByPostId(postId);
+    }
 }