diff --git a/Podfile b/Podfile
index e79dd2ba..adeb4fd6 100644
--- a/Podfile
+++ b/Podfile
@@ -2,6 +2,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 use_frameworks!
 
+pod 'pop'
 pod 'AFNetworking'
 pod 'MZFayeClient', :path => '../CatchLib-iOS/MZFayeClient/'
 pod 'JPushSDK'
diff --git a/Podfile.lock b/Podfile.lock
index d66691c8..4b36481a 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -25,6 +25,7 @@ PODS:
   - MZFayeClient (1.0.0):
     - Base64 (~> 1.0.1)
     - SocketRocket (~> 0.3.1-beta2)
+  - pop (1.0.7)
   - Realm (0.91.3):
     - Realm/Headers (= 0.91.3)
   - Realm/Headers (0.91.3)
@@ -34,6 +35,7 @@ DEPENDENCIES:
   - AFNetworking
   - JPushSDK
   - MZFayeClient (from `../CatchLib-iOS/MZFayeClient/`)
+  - pop
   - Realm
 
 EXTERNAL SOURCES:
@@ -45,6 +47,7 @@ SPEC CHECKSUMS:
   Base64: 4924bf3ca6fa559a5161ef717291bd450eb7bd1a
   JPushSDK: c68dd04c595a5c93aa003f212974010790410d8e
   MZFayeClient: 19df756a4c86c8f414668e6edc54fccfee54adbb
+  pop: 628ffc631644601567ee8bfaaaea493ebd7d0923
   Realm: 4bfdac6f0f3170a3947c7196e2e9a2e49c943719
   SocketRocket: 7284ab9370a06c99aba92b2fe3a32aedd0f9a6fa
 
diff --git a/Yep.xcodeproj/project.pbxproj b/Yep.xcodeproj/project.pbxproj
index b809e557..0e1bafb8 100644
--- a/Yep.xcodeproj/project.pbxproj
+++ b/Yep.xcodeproj/project.pbxproj
@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		0A02E46F1AC9208A00235DBF /* libxml2.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = 0A02E46E1AC9208A00235DBF /* libxml2.dylib */; };
 		0A0A117F1AE382AC0008772C /* AnnoationCollectionReusableView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A0A117E1AE382AC0008772C /* AnnoationCollectionReusableView.swift */; };
+		0A0A11821AE389380008772C /* RegisterSkillsLayout.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A0A11811AE389380008772C /* RegisterSkillsLayout.swift */; };
 		0A271FD71ACA055400822DFC /* YepAudioService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A271FD61ACA055400822DFC /* YepAudioService.swift */; };
 		0A3E60601ACCA9C0003DC853 /* String+Yep.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A3E605F1ACCA9C0003DC853 /* String+Yep.swift */; };
 		0A3E60671ACCAECE003DC853 /* YepLocationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A3E60661ACCAECE003DC853 /* YepLocationService.swift */; };
@@ -21,6 +22,7 @@
 		0A8F54C71AB67D11004AD60E /* YepTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A8F54C61AB67D11004AD60E /* YepTests.swift */; };
 		0A944C251AC8BB2F00037A06 /* YepStorageService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0A944C241AC8BB2F00037A06 /* YepStorageService.swift */; };
 		0AAFCFF91AC8CA5B00EB0EF8 /* MobileCoreServices.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0AAFCFF81AC8CA5B00EB0EF8 /* MobileCoreServices.framework */; };
+		0AC725AE1AE3A94D005A3A98 /* SecondAnnoationLabelView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0AC725AD1AE3A94D005A3A98 /* SecondAnnoationLabelView.swift */; };
 		0AD7EA5E1AC3ED1200617758 /* CFNetwork.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0AD7EA5D1AC3ED1200617758 /* CFNetwork.framework */; };
 		0AD7EA601AC3ED1900617758 /* CoreFoundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0AD7EA5F1AC3ED1900617758 /* CoreFoundation.framework */; };
 		0AD7EA621AC3ED2100617758 /* CoreTelephony.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0AD7EA611AC3ED2100617758 /* CoreTelephony.framework */; };
@@ -136,6 +138,7 @@
 /* Begin PBXFileReference section */
 		0A02E46E1AC9208A00235DBF /* libxml2.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = libxml2.dylib; path = usr/lib/libxml2.dylib; sourceTree = SDKROOT; };
 		0A0A117E1AE382AC0008772C /* AnnoationCollectionReusableView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = AnnoationCollectionReusableView.swift; path = Views/ReusableViews/AnnoationLabel/AnnoationCollectionReusableView.swift; sourceTree = "<group>"; };
+		0A0A11811AE389380008772C /* RegisterSkillsLayout.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = RegisterSkillsLayout.swift; path = ViewControllers/Register/RegisterSkillsLayout.swift; sourceTree = "<group>"; };
 		0A271FD61ACA055400822DFC /* YepAudioService.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = YepAudioService.swift; path = Services/YepAudioService.swift; sourceTree = "<group>"; };
 		0A3E605F1ACCA9C0003DC853 /* String+Yep.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = "String+Yep.swift"; path = "Extensions/String+Yep.swift"; sourceTree = "<group>"; };
 		0A3E60661ACCAECE003DC853 /* YepLocationService.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = YepLocationService.swift; path = Services/YepLocationService.swift; sourceTree = "<group>"; };
@@ -152,6 +155,7 @@
 		0A8F54C61AB67D11004AD60E /* YepTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = YepTests.swift; sourceTree = "<group>"; };
 		0A944C241AC8BB2F00037A06 /* YepStorageService.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = YepStorageService.swift; path = Services/YepStorageService.swift; sourceTree = "<group>"; };
 		0AAFCFF81AC8CA5B00EB0EF8 /* MobileCoreServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = MobileCoreServices.framework; path = System/Library/Frameworks/MobileCoreServices.framework; sourceTree = SDKROOT; };
+		0AC725AD1AE3A94D005A3A98 /* SecondAnnoationLabelView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = SecondAnnoationLabelView.swift; path = Views/ReusableViews/AnnoationLabel/SecondAnnoationLabelView.swift; sourceTree = "<group>"; };
 		0AD7EA511AC3EA6F00617758 /* JPushSDK.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = JPushSDK.framework; path = "Pods/../build/Debug-iphoneos/Pods/JPushSDK.framework"; sourceTree = "<group>"; };
 		0AD7EA581AC3EAF300617758 /* Yep-Bridging-Header.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "Yep-Bridging-Header.h"; sourceTree = "<group>"; };
 		0AD7EA5B1AC3ECD700617758 /* libPushSDK-1.8.3.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; name = "libPushSDK-1.8.3.a"; path = "Yep/lib/libPushSDK-1.8.3.a"; sourceTree = "<group>"; };
@@ -296,6 +300,7 @@
 			isa = PBXGroup;
 			children = (
 				0A0A117E1AE382AC0008772C /* AnnoationCollectionReusableView.swift */,
+				0AC725AD1AE3A94D005A3A98 /* SecondAnnoationLabelView.swift */,
 			);
 			name = Annoation;
 			sourceTree = "<group>";
@@ -544,6 +549,7 @@
 				50C0909A1ADE234F00CC6389 /* RegisterPickSkillsViewController.swift */,
 				50C0909C1ADE294800CC6389 /* RegisterPickSkillsLayout.swift */,
 				50C090A31ADE46D500CC6389 /* RegisterSelectSkillsViewController.swift */,
+				0A0A11811AE389380008772C /* RegisterSkillsLayout.swift */,
 			);
 			name = Register;
 			sourceTree = "<group>";
@@ -1075,6 +1081,7 @@
 				503CAB431AC00CB100DFE830 /* ConversationViewController.swift in Sources */,
 				50553F931ADBA50600F80B59 /* NSDate+Yep.swift in Sources */,
 				5023DE331AB688F600B3EE96 /* UIColor+Yep.swift in Sources */,
+				0AC725AE1AE3A94D005A3A98 /* SecondAnnoationLabelView.swift in Sources */,
 				503315971AC1017E0008A209 /* ChatLeftTextCell.swift in Sources */,
 				0A8F54B11AB67D11004AD60E /* AppDelegate.swift in Sources */,
 				508D174C1ACCF49B0092D666 /* ChatRightAudioCell.swift in Sources */,
@@ -1104,6 +1111,7 @@
 				0A0A117F1AE382AC0008772C /* AnnoationCollectionReusableView.swift in Sources */,
 				50A9D4511ACD383E000B2599 /* NSDate+Extension.swift in Sources */,
 				506EC20A1AC95BFC00CE42B3 /* UIFont+Yep.swift in Sources */,
+				0A0A11821AE389380008772C /* RegisterSkillsLayout.swift in Sources */,
 				50C0909B1ADE234F00CC6389 /* RegisterPickSkillsViewController.swift in Sources */,
 				508D16BD1ADCAF0400270E3F /* PullToRefreshView.swift in Sources */,
 				508D17441ACCDC9F0092D666 /* VoiceRecordButton.swift in Sources */,
diff --git a/Yep/Base.lproj/Intro.storyboard b/Yep/Base.lproj/Intro.storyboard
index ae7e8d98..c2a20440 100644
--- a/Yep/Base.lproj/Intro.storyboard
+++ b/Yep/Base.lproj/Intro.storyboard
@@ -557,11 +557,11 @@
                                 </collectionViewFlowLayout>
                                 <cells/>
                                 <collectionReusableView key="sectionHeaderView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" reuseIdentifier="annoationLabelView" id="LgN-Ip-NL7" customClass="AnnoationCollectionReusableView" customModule="Yep" customModuleProvider="target">
-                                    <rect key="frame" x="0.0" y="0.0" width="600" height="50"/>
+                                    <rect key="frame" x="0.0" y="0.0" width="600" height="150"/>
                                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                     <subviews>
-                                        <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" text="What are you learning?" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="aSB-2s-v3n" userLabel="Annotation Label">
-                                            <rect key="frame" x="152" y="7" width="296" height="36"/>
+                                        <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="What are you learning?" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="aSB-2s-v3n" userLabel="Annotation Label">
+                                            <rect key="frame" x="152" y="57" width="296" height="36"/>
                                             <constraints>
                                                 <constraint firstAttribute="width" constant="200" id="bNN-vJ-go0"/>
                                             </constraints>
@@ -591,8 +591,37 @@
                             <collectionView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" dataMode="prototypes" translatesAutoresizingMaskIntoConstraints="NO" id="xur-C9-Tc1" userLabel="Skills Collection View">
                                 <rect key="frame" x="0.0" y="20" width="600" height="580"/>
                                 <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                                <collectionViewLayout key="collectionViewLayout" id="C6X-CX-CTd" customClass="RegisterPickSkillsLayout" customModule="Yep" customModuleProvider="target"/>
+                                <collectionViewFlowLayout key="collectionViewLayout" minimumLineSpacing="10" minimumInteritemSpacing="10" id="Q4i-Zz-uXN">
+                                    <size key="itemSize" width="50" height="50"/>
+                                    <size key="headerReferenceSize" width="50" height="100"/>
+                                    <size key="footerReferenceSize" width="0.0" height="0.0"/>
+                                    <inset key="sectionInset" minX="0.0" minY="0.0" maxX="0.0" maxY="0.0"/>
+                                </collectionViewFlowLayout>
                                 <cells/>
+                                <collectionReusableView key="sectionHeaderView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" reuseIdentifier="secondAnnoationLabelView" id="b3p-vo-BwH" customClass="SecondAnnoationLabelView" customModule="Yep" customModuleProvider="target">
+                                    <rect key="frame" x="0.0" y="0.0" width="600" height="50"/>
+                                    <autoresizingMask key="autoresizingMask"/>
+                                    <subviews>
+                                        <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Popular in Art" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Mr8-HT-R4V" userLabel="Annotation Label">
+                                            <rect key="frame" x="213" y="32" width="175" height="36"/>
+                                            <constraints>
+                                                <constraint firstAttribute="width" constant="200" id="sAV-N9-QfM"/>
+                                            </constraints>
+                                            <fontDescription key="fontDescription" type="system" weight="light" pointSize="30"/>
+                                            <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                            <nil key="highlightedColor"/>
+                                            <variation key="default">
+                                                <mask key="constraints">
+                                                    <exclude reference="sAV-N9-QfM"/>
+                                                </mask>
+                                            </variation>
+                                        </label>
+                                    </subviews>
+                                    <constraints>
+                                        <constraint firstAttribute="centerX" secondItem="Mr8-HT-R4V" secondAttribute="centerX" id="BfU-jo-hRr"/>
+                                        <constraint firstAttribute="centerY" secondItem="Mr8-HT-R4V" secondAttribute="centerY" id="pK4-zR-gnS"/>
+                                    </constraints>
+                                </collectionReusableView>
                                 <connections>
                                     <outlet property="dataSource" destination="vEE-XY-eq4" id="sK5-GO-ZjU"/>
                                     <outlet property="delegate" destination="vEE-XY-eq4" id="3Vs-cc-fvq"/>
diff --git a/Yep/ViewControllers/Register/RegisterSelectSkillsViewController.swift b/Yep/ViewControllers/Register/RegisterSelectSkillsViewController.swift
index fdc0d3c3..640dc26a 100644
--- a/Yep/ViewControllers/Register/RegisterSelectSkillsViewController.swift
+++ b/Yep/ViewControllers/Register/RegisterSelectSkillsViewController.swift
@@ -7,6 +7,7 @@
 //
 
 import UIKit
+import pop
 
 class RegisterSelectSkillsViewController: UIViewController {
 
@@ -83,6 +84,30 @@ class RegisterSelectSkillsViewController: UIViewController {
 
         skillsCollectionView.registerNib(UINib(nibName: skillSelectionCellIdentifier, bundle: nil), forCellWithReuseIdentifier: skillSelectionCellIdentifier)
 
+        
+        var layout = self.skillCategoriesCollectionView.collectionViewLayout as! UICollectionViewFlowLayout
+        var originLineSpacing = layout.minimumLineSpacing
+        var anim = POPBasicAnimation();
+        anim.duration = 0.8
+        anim.timingFunction = CAMediaTimingFunction(name: "easeInEaseOut")
+        var prop = POPAnimatableProperty.propertyWithName("minimumLineSpacing", initializer: { props in
+            
+            props.readBlock = { obj, values in
+                values[0] = (obj as! UICollectionViewFlowLayout).minimumLineSpacing
+            }
+            props.writeBlock = { obj, values in
+                (obj as! UICollectionViewFlowLayout).minimumLineSpacing = values[0]
+            }
+            
+            props.threshold = 0.01
+            
+        }) as! POPAnimatableProperty
+        
+        anim.property = prop
+        anim.fromValue = 100.0
+        anim.toValue = originLineSpacing
+        
+        layout.pop_addAnimation(anim, forKey: "AnimateLine")
 
     }
 
@@ -104,17 +129,24 @@ extension RegisterSelectSkillsViewController: UICollectionViewDataSource, UIColl
     func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
         var reusableview: UICollectionReusableView!
         
+        
         if kind == UICollectionElementKindSectionHeader {
-            var headerView: AnnoationCollectionReusableView = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: "annoationLabelView", forIndexPath: indexPath) as! AnnoationCollectionReusableView
-            
-            headerView.label.text = annotationText
-            
-            let tap = UITapGestureRecognizer(target: self, action: "dismiss")
-            headerView.label.userInteractionEnabled = true
-            headerView.label.addGestureRecognizer(tap)
-            self.annotationLabel = headerView.label
-            
-            reusableview = headerView
+            if collectionView == skillCategoriesCollectionView {
+                var headerView: AnnoationCollectionReusableView = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: "annoationLabelView", forIndexPath: indexPath) as! AnnoationCollectionReusableView
+                
+                headerView.label.text = annotationText
+                
+                let tap = UITapGestureRecognizer(target: self, action: "dismiss")
+                headerView.label.userInteractionEnabled = true
+                headerView.label.addGestureRecognizer(tap)
+                self.annotationLabel = headerView.label
+                
+                reusableview = headerView
+            }else {
+                var headerView: SecondAnnoationLabelView = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: "secondAnnoationLabelView", forIndexPath: indexPath) as! SecondAnnoationLabelView
+                
+                reusableview = headerView
+            }
         }
         
         
@@ -182,7 +214,7 @@ extension RegisterSelectSkillsViewController: UICollectionViewDataSource, UIColl
                     self.currentSkillCategoryButtonTopConstraint = topConstraint
                     self.currentSkillCategoryButtonTopConstraintOriginalConstant = self.currentSkillCategoryButtonTopConstraint.constant
 
-                    UIView.animateWithDuration(0.5, delay: 0.0, options: .CurveEaseInOut, animations: { () -> Void in
+                    UIView.animateWithDuration(0.8, delay: 0.0, options: .CurveEaseInOut, animations: { () -> Void in
 
                         topConstraint.constant = 60
 
@@ -193,20 +225,47 @@ extension RegisterSelectSkillsViewController: UICollectionViewDataSource, UIColl
 
                     }, completion: { (finished) -> Void in
                     })
+                    
+                    var layout = self.skillsCollectionView.collectionViewLayout as! UICollectionViewFlowLayout
+                    var originLineSpacing = layout.minimumLineSpacing
+                    var anim = POPBasicAnimation();
+                    anim.duration = 1.5
+                    anim.timingFunction = CAMediaTimingFunction(name: "easeOut")
+                    var prop = POPAnimatableProperty.propertyWithName("minimumLineSpacing", initializer: { props in
+                        
+                        props.readBlock = { obj, values in
+                            values[0] = (obj as! UICollectionViewFlowLayout).minimumLineSpacing
+                        }
+                        props.writeBlock = { obj, values in
+                            (obj as! UICollectionViewFlowLayout).minimumLineSpacing = values[0]
+                        }
+                        
+                        props.threshold = 0.01
+                        
+                    }) as! POPAnimatableProperty
+                    
+                    anim.property = prop
+                    anim.fromValue = 150.0
+                    anim.toValue = originLineSpacing
+                    
+                    layout.pop_addAnimation(anim, forKey: "AnimateLine")
+                    
 
-                    UIView.animateWithDuration(0.5, delay: 0.2, options: .CurveEaseInOut, animations: { () -> Void in
-
+                    UIView.animateWithDuration(0.8, delay: 0.2, options: .CurveEaseInOut, animations: { () -> Void in
+                        
+                        
                         self.skillsCollectionViewBottomConstrain.constant = -150
-
                         self.view.layoutIfNeeded()
-
                         self.skillsCollectionView.alpha = 1
-
+  
+                        
                     }, completion: { (finished) -> Void in
                     })
 
                 } else {
                     if let button = self.currentSkillCategoryButton {
+
+                        
                         UIView.animateWithDuration(0.2, delay: 0.0, options: .CurveEaseInOut, animations: { () -> Void in
 
                             self.skillsCollectionView.alpha = 0
diff --git a/Yep/ViewControllers/Register/RegisterSkillsLayout.swift b/Yep/ViewControllers/Register/RegisterSkillsLayout.swift
new file mode 100644
index 00000000..685bc425
--- /dev/null
+++ b/Yep/ViewControllers/Register/RegisterSkillsLayout.swift
@@ -0,0 +1,142 @@
+//
+//  RegisterSkillsLayout.swift
+//  Yep
+//
+//  Created by kevinzhow on 15/4/19.
+//  Copyright (c) 2015年 Catch Inc. All rights reserved.
+//
+
+import UIKit
+
+class RegisterSkillsLayout: UICollectionViewFlowLayout {
+    
+    var animator: UIDynamicAnimator!
+    
+    var visibleIndexPaths = NSMutableSet()
+    
+    var lastContentOffset = CGPoint(x: 0, y: 0)
+    var lastScrollDelta: CGFloat!
+    var lastTouchLocation: CGPoint!
+    
+    let kScrollPaddingRect:CGFloat = 100.0
+    let kScrollRefreshThreshold:Float = 50.0
+    let kScrollResistanceCoefficient:CGFloat = 1 / 600.0
+
+    override init() {
+        super.init()
+        setup()
+    }
+
+    required init(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        setup()
+    }
+    
+    func setup() {
+        animator = UIDynamicAnimator(collectionViewLayout: self)
+    }
+    
+    override func prepareLayout() {
+        super.prepareLayout()
+        var contentOffset = self.collectionView!.contentOffset
+        
+        // only refresh the set of UIAttachmentBehaviours if we've moved more than the scroll threshold since last load
+        if (fabsf(Float(contentOffset.y) - Float(lastContentOffset.y)) < Float(kScrollRefreshThreshold)) && visibleIndexPaths.count > 0{
+            return
+        }
+        lastContentOffset = contentOffset
+        
+        var padding = kScrollPaddingRect
+        var currentRect = CGRectMake(0, contentOffset.y - padding, self.collectionView!.frame.size.width, self.collectionView!.frame.size.height + 3 * padding)
+        
+        var itemsInCurrentRect = super.layoutAttributesForElementsInRect(currentRect)! as NSArray
+        var indexPathsInVisibleRect = NSSet(array: itemsInCurrentRect.valueForKey("indexPath") as! [AnyObject])
+        
+        // Remove behaviours that are no longer visible
+        
+        for behaviour in animator!.behaviors as! [UIAttachmentBehavior] {
+            var indexPath = behaviour.items.first?.indexPath
+            
+            var isInVisibleIndexPaths = indexPathsInVisibleRect.member(indexPath!) != nil
+            if (!isInVisibleIndexPaths){
+                animator.removeBehavior(behaviour)
+                visibleIndexPaths.removeObject(indexPath!)
+            }
+        }
+        
+        // Find newly visible indexes
+        var newVisibleItems = itemsInCurrentRect.filteredArrayUsingPredicate(NSPredicate(block: { (item, bindings) -> Bool in
+            var isInVisibleIndexPaths = self.visibleIndexPaths.member(item.indexPath) != nil
+            return !isInVisibleIndexPaths
+        }));
+
+        for attribute in newVisibleItems as! [UICollectionViewLayoutAttributes] {
+            var spring = UIAttachmentBehavior(item: attribute, attachedToAnchor: attribute.center)
+            spring.length = 0
+            spring.frequency = 1.5
+            spring.damping = 0.8
+            
+            // If our touchLocation is not (0,0), we need to adjust our item's center
+            if (lastScrollDelta != nil) {
+                self.adjustSpring(spring, touchLocation: lastTouchLocation, scrollDelta: lastScrollDelta)
+            }
+            animator.addBehavior(spring)
+            visibleIndexPaths.addObject(attribute.indexPath)
+        }
+
+    }
+    
+    func adjustSpring(spring: UIAttachmentBehavior, touchLocation: CGPoint, scrollDelta: CGFloat) {
+        let anchorPoint = spring.anchorPoint
+        let distanceFromTouch = fabs(touchLocation.y - anchorPoint.y)
+        let scrollResistance = distanceFromTouch * kScrollResistanceCoefficient
+        
+        let attributes = spring.items.first as! UICollectionViewLayoutAttributes
+        
+        attributes.center.y += lastScrollDelta > 0 ? min(scrollDelta, scrollDelta * scrollResistance) : max(scrollDelta, scrollDelta * scrollResistance)
+    }
+    
+    override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes! {
+        if let layoutAttributes = animator!.layoutAttributesForCellAtIndexPath(indexPath) {
+            return layoutAttributes
+        }else {
+            var layoutAttributes = super.layoutAttributesForItemAtIndexPath(indexPath)
+            return layoutAttributes
+        }
+    }
+    
+    override func layoutAttributesForElementsInRect(rect: CGRect) -> [AnyObject]? {
+        var newRect = rect
+        var padding:CGFloat = kScrollPaddingRect
+        newRect.size.height += 3.0*padding
+        newRect.origin.y -= padding
+        return animator!.itemsInRect(newRect)
+    }
+    
+    override func shouldInvalidateLayoutForBoundsChange(newBounds: CGRect) -> Bool {
+        let scrollView = collectionView! as UIScrollView
+        
+        lastScrollDelta = newBounds.origin.y - scrollView.bounds.origin.y
+        
+        lastTouchLocation = scrollView.panGestureRecognizer.locationInView(scrollView)
+        
+        for behaviour in animator!.behaviors as! [UIAttachmentBehavior] {
+            self.adjustSpring(behaviour, touchLocation: lastTouchLocation, scrollDelta: lastScrollDelta)
+            animator!.updateItemUsingCurrentState(behaviour.items.first as! UIDynamicItem)
+        }
+        
+        return false
+    }
+    
+    func reset() {
+        animator.removeAllBehaviors()
+        visibleIndexPaths.removeAllObjects()
+    }
+    
+    override func layoutAttributesForSupplementaryViewOfKind(elementKind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes! {
+        var attributes = UICollectionViewLayoutAttributes(forSupplementaryViewOfKind: elementKind, withIndexPath: indexPath)
+        attributes.frame = CGRect(x: 0, y: 0, width: 320, height: 50)
+        
+        return attributes
+    }
+}
diff --git a/Yep/Views/ReusableViews/AnnoationLabel/SecondAnnoationLabelView.swift b/Yep/Views/ReusableViews/AnnoationLabel/SecondAnnoationLabelView.swift
new file mode 100644
index 00000000..41d43e76
--- /dev/null
+++ b/Yep/Views/ReusableViews/AnnoationLabel/SecondAnnoationLabelView.swift
@@ -0,0 +1,13 @@
+//
+//  SecondAnnoationLabelView.swift
+//  Yep
+//
+//  Created by kevinzhow on 15/4/19.
+//  Copyright (c) 2015年 Catch Inc. All rights reserved.
+//
+
+import UIKit
+
+class SecondAnnoationLabelView: UICollectionReusableView {
+        
+}