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diff --git a/index.html b/index.html
index 0f15a3d..ab77c58 100644
--- a/index.html
+++ b/index.html
@@ -97,6 +97,14 @@
                     <h2>Updates</h2>
                     <ul>
                         <li>
+                            <p class="first"><strong>December 2021</strong></p>
+                            <div>
+                                <ul>
+                                    <li><a href="https://clarkzjw.medium.com/2021%E5%B9%B4%E5%BA%A6%E6%80%BB%E7%BB%93-e1d73cf511">2021年度总结</a></li>
+                                </ul>
+                            </div>
+                        </li>
+                        <li>
                             <p class="first"><strong>September 2021</strong></p>
                             <div>
                                 <ul>