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diff --git a/index.html b/index.html
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--- a/index.html
+++ b/index.html
@@ -38,10 +38,11 @@
 								<h3><a href="https://pki.zhanganjun.com">PKI Services</a></h3>
 								<p>Zhang Anjun PKI Services was established to support the generation, issuance, distribution, revocation, administration, and management of public/private cryptographic keys that are contained in CA-signed X.509 Certificates.</p>
 							</article>
+							
 							<article class="col-6 col-12-xsmall work-item">
-								<a href="images/next_permutation.jpg" class="image fit thumb"><img src="images/next_permutation.jpg" alt="" /></a>
-								<h3><a href="https://github.com/CitizenBeta/Next-Permutation">Next Permutation</a></h3>
-								<p>A Python script to compute the next smaller and larger permutations of a given number (If you cannot access GitHub, <a href="https://repo.zhanganjun.com/Next-Permutation">click here</a>).</p>
+								<a href="images/orbital_matrix_rotation.jpg" class="image fit thumb"><img src="images/orbital_matrix_rotation.jpg" alt="" /></a>
+								<h3><a href="https://github.com/CitizenBeta/Orbital-Matrix-Rotation">Orbital Matrix Rotation</a></h3>
+								<p>A Python script to rotate a specified orbit of a 7×7 matrix. (If you cannot access GitHub, <a href="https://repo.zhanganjun.com/Orbital-Matrix-Rotation/">click here</a>).</p>
 							</article>
 							<article class="col-6 col-12-xsmall work-item">
 								<a href="images/calendar_generator.jpg" class="image fit thumb"><img src="images/calendar_generator.jpg" alt="" /></a>
@@ -80,7 +81,7 @@
 					</ul>
 					<ul class="copyright">
 						<li>&copy; <span id=year><script>document.getElementById("year").innerHTML=(new Date).getFullYear()</script></span> Zhang Anjun. All rights reserved.</li>
-						<li><a href="https://github.com/CitizenBeta/Homepage/releases/tag/v3.11.3">v3.11.3</a></li>
+						<li><a href="https://github.com/CitizenBeta/Homepage/releases/tag/v3.12">v3.12</a></li>
 						<li><a href="https://zaj.statuspage.io/">System Status</a></li>
 						<li><img src="https://static.zhanganjun.com/common/beian.png" style="width:16px;"/><a href="https://beian.mps.gov.cn/#/query/webSearch?code=11010802045392" rel="noreferrer" target="_blank">京公网安备11010802045392号</a></li>
 						<li><a href="https://beian.miit.gov.cn" target="_blank">京ICP备2025105392号-2</a></li>