diff --git a/src/main/java/org/ntlab/amaryllis/server/entities/Voicememo.java b/src/main/java/org/ntlab/amaryllis/server/entities/Voicememo.java
index 137d4e6..d072773 100644
--- a/src/main/java/org/ntlab/amaryllis/server/entities/Voicememo.java
+++ b/src/main/java/org/ntlab/amaryllis/server/entities/Voicememo.java
@@ -37,17 +37,10 @@
         setSummary(summary);
         this.times = 0;
         this.favos = 0;
-//        categories = new ArrayList<>();
-//        comments = new ArrayList<>();
+        categories = new ArrayList<>();
+        comments = new ArrayList<>();
     }
 
-
-//    public void editVoicememo(String title, String summary) {
-//        setTitle(title);
-//        setSummary(summary);
-//    }
-
-
     public String getVid() {
         return vid;
     }
@@ -159,47 +152,47 @@
         favos = favolist.size();
     }
 
-//
-//    public ArrayList<String> getCategory(){ return categories; }
-//
-//    public void addCategory(String categoryId){
-//        for (String a : categories) {
-//            if (a.equals(categoryId)) {
-//                return;
-//            }
-//        }
-//        categories.add(categoryId);
-//    }
-//
-//    public void removeCategory(String CategoryId) {
-//        categories.remove(CategoryId);
-//    }
-//
-//
-//    public ArrayList<Comment> getComments(){ return comments; }
-//
-//    public Comment getComment(String commentId) {
-//        for (Comment a : comments) {
-//            if (a.getCid().equals(commentId)) {
-//                return a;
-//            }
-//        }
-//        return null;
-//    }
-//
-//    public Comment createComment(String uid, String text) {
-//        if (uid == null || text == null) {
-//            return null;
-//        }
-//        Comment newComment = new Comment(uid, text);
-//        comments.add(newComment);
-//        return newComment;
-//    }
-//
-//    public void removeComment(String commentId) {
-//        Comment removeComment = getComment(commentId);
-//        comments.remove(removeComment);
-//    }
+
+    public ArrayList<String> getCategory(){ return categories; }
+
+    public void addCategory(String categoryId){
+        for (String a : categories) {
+            if (a.equals(categoryId)) {
+                return;
+            }
+        }
+        categories.add(categoryId);
+    }
+
+    public void removeCategory(String CategoryId) {
+        categories.remove(CategoryId);
+    }
+
+
+    public ArrayList<Comment> getComments(){ return comments; }
+
+    public Comment getComment(String commentId) {
+        for (Comment a : comments) {
+            if (a.getCid().equals(commentId)) {
+                return a;
+            }
+        }
+        return null;
+    }
+
+    public Comment createComment(String uid, String text) {
+        if (uid == null || text == null) {
+            return null;
+        }
+        Comment newComment = new Comment(uid, text);
+        comments.add(newComment);
+        return newComment;
+    }
+
+    public void removeComment(String commentId) {
+        Comment removeComment = getComment(commentId);
+        comments.remove(removeComment);
+    }
 
 
 }