diff --git a/homepage/about.html b/homepage/about.html
index 988ca62..ab8482e 100644
--- a/homepage/about.html
+++ b/homepage/about.html
@@ -118,42 +118,7 @@
 			  	</ul>
 		  	</div>
 		</aside>
-		<div class="fh5co-parallax" style="background-image: url(images/about/工场logo2.jpg);" data-stellar-background-ratio="0.5">
-			<div class="overlay"></div>
-			<div class="container">
-				<div class="row">
-					<div class="col-md-12 col-md-offset-0 col-sm-12 col-sm-offset-0 col-xs-12 col-xs-offset-0 text-center fh5co-table">
-						<div class="fh5co-intro fh5co-table-cell animate-box">
-							<h1 class="text-center">Leading Technology Team in Tsinghua.</h1>
-						</div>
-					</div>
-				</div>
-			</div>
-		</div>
-		<div class="fh5co-parallax" style="background-image: url(images/about/innovation.jpg);" data-stellar-background-ratio="0.5">
-			<div class="overlay"></div>
-			<div class="container">
-				<div class="row">
-					<div class="col-md-12 col-md-offset-0 col-sm-12 col-sm-offset-0 col-xs-12 col-xs-offset-0 text-center fh5co-table">
-						<div class="fh5co-intro fh5co-table-cell animate-box">
-							<h1 class="text-center">Innovation & Motivation.</h1>
-						</div>
-					</div>
-				</div>
-			</div>
-		</div>
-		<div class="fh5co-parallax" style="background-image: url(images/about/工场.jpg);" data-stellar-background-ratio="0.5">
-				<div class="overlay"></div>
-				<div class="container">
-					<div class="row">
-						<div class="col-md-12 col-md-offset-0 col-sm-12 col-sm-offset-0 col-xs-12 col-xs-offset-0 text-center fh5co-table">
-							<div class="fh5co-intro fh5co-table-cell animate-box">
-								<h1 class="text-center">Abundant Resources & Geeks.</h1>
-							</div>
-						</div>
-					</div>
-				</div>
-			</div>
+		
 		<!--contact information-->
 		<footer id="footer">
 				<div class="container">
@@ -170,7 +135,7 @@
 									<ul class="link">
 										<li><a href="./about.html">About Us</a></li>
 										<li><a href="projects.html">Projects</a></li>
-										<li><a href="#">Join Us</a></li>
+										<li><a href="https://thu-skyworks.org/register/">Join Us</a></li>
 										<li><a href="./contact.html">Contact Us</a></li>
 									</ul>
 								</div>
diff --git a/homepage/contact.html b/homepage/contact.html
index 7ae3832..9ef32d9 100644
--- a/homepage/contact.html
+++ b/homepage/contact.html
@@ -217,7 +217,7 @@
 									<ul class="link">
 										<li><a href="./about.html">About Us</a></li>
 										<li><a href="projects.html">Projects</a></li>
-										<li><a href="#">Join Us</a></li>
+										<li><a href="https://thu-skyworks.org/register/">Join Us</a></li>
 										<li><a href="./contact.html">Contact Us</a></li>
 									</ul>
 								</div>
diff --git a/homepage/index.html b/homepage/index.html
index f958625..d24d2e7 100644
--- a/homepage/index.html
+++ b/homepage/index.html
@@ -123,7 +123,7 @@
 			   			<div class="col-md-10 col-md-offset-1 text-center js-fullheight slider-text">
 			   				<div class="slider-text-inner">
 			   					<h2>We are looking for you!</h2>
-                                <p><a href="#" class="btn btn-primary btn-lg">Join Us</a></p>
+                                <p><a href="https://thu-skyworks.org/register/" class="btn btn-primary btn-lg">Join Us</a></p>
 			   				</div>
 			   			</div>
 			   		</div>
@@ -134,7 +134,7 @@
 			   			<div class="col-md-10 col-md-offset-1 text-center js-fullheight slider-text">
 			   				<div class="slider-text-inner">
 			   					<h2>Leave any questions.</h2>
-			   					<p><a href="#" class="btn btn-primary btn-lg">Contact Us</a></p>
+			   					<p><a href="contact.html" class="btn btn-primary btn-lg">Contact Us</a></p>
 			   				</div>
 			   			</div>
 			   		</div>
@@ -284,7 +284,7 @@
 									<ul class="link">
 										<li><a href="./about.html">About Us</a></li>
 										<li><a href="projects.html">Projects</a></li>
-										<li><a href="#">Join Us</a></li>
+										<li><a href="https://thu-skyworks.org/register/">Join Us</a></li>
 										<li><a href="./contact.html">Contact Us</a></li>
 									</ul>
 								</div>
diff --git a/homepage/projects.html b/homepage/projects.html
index ea12d1f..c87650a 100644
--- a/homepage/projects.html
+++ b/homepage/projects.html
@@ -176,7 +176,7 @@
 									<ul class="link">
 										<li><a href="./about.html">About Us</a></li>
 										<li><a href="projects.html">Projects</a></li>
-										<li><a href="#">Join Us</a></li>
+										<li><a href="https://thu-skyworks.org/register/">Join Us</a></li>
 										<li><a href="./contact.html">Contact Us</a></li>
 									</ul>
 								</div>