diff --git a/Yep/AppDelegate.swift b/Yep/AppDelegate.swift
index 3a47bf2b..78567de7 100644
--- a/Yep/AppDelegate.swift
+++ b/Yep/AppDelegate.swift
@@ -326,11 +326,14 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
             guard let
                 vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("ConversationViewController") as? ConversationViewController,
-                realm = try? Realm(),
-                feedConversation = vc.prepareConversationForFeed(feed, inRealm: realm) else {
+                realm = try? Realm() else {
                     return
             }
 
+            realm.beginWrite()
+            let feedConversation = vc.prepareConversationForFeed(feed, inRealm: realm)
+            let _ = try? realm.commitWrite()
+
             vc.conversation = feedConversation
             vc.conversationFeed = ConversationFeed.DiscoveredFeedType(feed)
 
diff --git a/Yep/Realm/Models.swift b/Yep/Realm/Models.swift
index b57d7c9c..0a1f3226 100644
--- a/Yep/Realm/Models.swift
+++ b/Yep/Realm/Models.swift
@@ -971,10 +971,8 @@ func saveFeedWithDiscoveredFeed(feedData: DiscoveredFeed, group: Group, inRealm
     if let feed = feedWithFeedID(feedData.id, inRealm: realm) {
         println("saveFeed: \(feedData.kind.rawValue), \(feed.feedID), do nothing.")
 
-        //let _ = try? realm.write {
-            feed.kind = feedData.kind.rawValue
-            feed.deleted = false
-        //}
+        feed.kind = feedData.kind.rawValue
+        feed.deleted = false
 
         #if DEBUG
         if feed.group == nil {
@@ -1000,9 +998,7 @@ func saveFeedWithDiscoveredFeed(feedData: DiscoveredFeed, group: Group, inRealm
         newFeed.messagesCount = feedData.messagesCount
         
         if let feedSkill = feedData.skill {
-            let _ = try? realm.write {
-                newFeed.skill = userSkillsFromSkills([feedSkill], inRealm: realm).first
-            }
+            newFeed.skill = userSkillsFromSkills([feedSkill], inRealm: realm).first
         }
 
         if let attachment = feedData.attachment {
@@ -1027,17 +1023,13 @@ func saveFeedWithDiscoveredFeed(feedData: DiscoveredFeed, group: Group, inRealm
                     let newSocialWorkGithubRepo = SocialWorkGithubRepo()
                     newSocialWorkGithubRepo.fillWithFeedGithubRepo(repo)
 
-                    let _ = try? realm.write {
-                        realm.add(newSocialWorkGithubRepo)
-                    }
+                    realm.add(newSocialWorkGithubRepo)
 
                     socialWorkGithubRepo = newSocialWorkGithubRepo
                 }
 
                 if let socialWorkGithubRepo = socialWorkGithubRepo {
-                    let _ = try? realm.write {
-                        socialWorkGithubRepo.synced = true
-                    }
+                    socialWorkGithubRepo.synced = true
                 }
 
                 socialWork.githubRepo = socialWorkGithubRepo
@@ -1056,17 +1048,13 @@ func saveFeedWithDiscoveredFeed(feedData: DiscoveredFeed, group: Group, inRealm
                     let newSocialWorkDribbbleShot = SocialWorkDribbbleShot()
                     newSocialWorkDribbbleShot.fillWithFeedDribbbleShot(shot)
 
-                    let _ = try? realm.write {
-                        realm.add(newSocialWorkDribbbleShot)
-                    }
+                    realm.add(newSocialWorkDribbbleShot)
 
                     socialWorkDribbbleShot = newSocialWorkDribbbleShot
                 }
 
                 if let socialWorkDribbbleShot = socialWorkDribbbleShot {
-                    let _ = try? realm.write {
-                        socialWorkDribbbleShot.synced = true
-                    }
+                    socialWorkDribbbleShot.synced = true
                 }
 
                 socialWork.dribbbleShot = socialWorkDribbbleShot
@@ -1097,10 +1085,8 @@ func saveFeedWithDiscoveredFeed(feedData: DiscoveredFeed, group: Group, inRealm
 
         newFeed.group = group
         
-        //let _ = try? realm.write {
-            group.groupType = GroupType.Public.rawValue
-            realm.add(newFeed)
-        //}
+        group.groupType = GroupType.Public.rawValue
+        realm.add(newFeed)
     }
 }
 
diff --git a/Yep/Services/YepServiceSync.swift b/Yep/Services/YepServiceSync.swift
index ffbd0865..c92d8f15 100644
--- a/Yep/Services/YepServiceSync.swift
+++ b/Yep/Services/YepServiceSync.swift
@@ -38,38 +38,33 @@ func getOrCreateUserWithDiscoverUser(discoveredUser: DiscoveredUser, inRealm rea
         
         newUser.friendState = UserFriendState.Stranger.rawValue
 
-        let _ = try? realm.write {
-            realm.add(newUser)
-        }
+        realm.add(newUser)
 
         user = newUser
     }
     
     if let user = user {
         
-        let _ = try? realm.write {
+        // 只更新用户信息即可
 
-            // 只更新用户信息即可
+        user.lastSignInUnixTime = discoveredUser.lastSignInUnixTime
 
-            user.lastSignInUnixTime = discoveredUser.lastSignInUnixTime
+        user.username = discoveredUser.username ?? ""
 
-            user.username = discoveredUser.username ?? ""
+        user.nickname = discoveredUser.nickname
 
-            user.nickname = discoveredUser.nickname
+        if let introduction = discoveredUser.introduction {
+            user.introduction = introduction
+        }
 
-            if let introduction = discoveredUser.introduction {
-                user.introduction = introduction
-            }
+        user.avatarURLString = discoveredUser.avatarURLString
 
-            user.avatarURLString = discoveredUser.avatarURLString
+        user.longitude = discoveredUser.longitude
 
-            user.longitude = discoveredUser.longitude
-
-            user.latitude = discoveredUser.latitude
-            
-            if let badge = discoveredUser.badge {
-                user.badge = badge
-            }
+        user.latitude = discoveredUser.latitude
+        
+        if let badge = discoveredUser.badge {
+            user.badge = badge
         }
     }
 
diff --git a/Yep/ViewControllers/Conversation/ConversationViewController+Feed.swift b/Yep/ViewControllers/Conversation/ConversationViewController+Feed.swift
index f65e32da..32d3a332 100644
--- a/Yep/ViewControllers/Conversation/ConversationViewController+Feed.swift
+++ b/Yep/ViewControllers/Conversation/ConversationViewController+Feed.swift
@@ -22,9 +22,7 @@ extension ConversationViewController {
             newGroup.groupID = groupID
             newGroup.includeMe = false
 
-            let _ = try? realm.write {
-                realm.add(newGroup)
-            }
+            realm.add(newGroup)
 
             group = newGroup
         }
@@ -33,9 +31,7 @@ extension ConversationViewController {
             return nil
         }
 
-        let _ = try? realm.write {
-            feedGroup.groupType = GroupType.Public.rawValue
-        }
+        feedGroup.groupType = GroupType.Public.rawValue
 
         if feedGroup.conversation == nil {
 
@@ -44,9 +40,7 @@ extension ConversationViewController {
             newConversation.type = ConversationType.Group.rawValue
             newConversation.withGroup = feedGroup
 
-            let _ = try? realm.write {
-                realm.add(newConversation)
-            }
+            realm.add(newConversation)
         }
 
         guard let feedConversation = feedGroup.conversation else {
@@ -60,9 +54,7 @@ extension ConversationViewController {
         */
 
         if let group = group {
-            let _ = try? realm.write {
-                saveFeedWithDiscoveredFeed(feed, group: group, inRealm: realm)
-            }
+            saveFeedWithDiscoveredFeed(feed, group: group, inRealm: realm)
         }
 
         return feedConversation
diff --git a/Yep/ViewControllers/Conversation/ConversationViewController.swift b/Yep/ViewControllers/Conversation/ConversationViewController.swift
index 740515b9..550e5bff 100644
--- a/Yep/ViewControllers/Conversation/ConversationViewController.swift
+++ b/Yep/ViewControllers/Conversation/ConversationViewController.swift
@@ -51,7 +51,11 @@ enum ConversationFeed {
             guard let realm = try? Realm() else {
                 return nil
             }
-            return getOrCreateUserWithDiscoverUser(discoveredFeed.creator, inRealm: realm)
+            realm.beginWrite()
+            let user = getOrCreateUserWithDiscoverUser(discoveredFeed.creator, inRealm: realm)
+            let _ = try? realm.commitWrite()
+
+            return user
             
         case .FeedType(let feed):
             return feed.creator
diff --git a/Yep/ViewControllers/Feeds/FeedsViewController.swift b/Yep/ViewControllers/Feeds/FeedsViewController.swift
index 53d06ce2..548c4aae 100644
--- a/Yep/ViewControllers/Feeds/FeedsViewController.swift
+++ b/Yep/ViewControllers/Feeds/FeedsViewController.swift
@@ -580,11 +580,14 @@ class FeedsViewController: BaseViewController {
             guard let
                 indexPath = sender as? NSIndexPath,
                 feed = feeds[safe: indexPath.row],
-                realm = try? Realm(),
-                feedConversation = vc.prepareConversationForFeed(feed, inRealm: realm) else {
+                realm = try? Realm() else {
                     return
             }
 
+            realm.beginWrite()
+            let feedConversation = vc.prepareConversationForFeed(feed, inRealm: realm)
+            let _ = try? realm.commitWrite()
+
             vc.conversation = feedConversation
             vc.conversationFeed = ConversationFeed.DiscoveredFeedType(feed)
             vc.afterDeletedFeedAction = { [weak self] in