diff --git a/Gemfile b/Gemfile
index d89f9a24..ac45f360 100644
--- a/Gemfile
+++ b/Gemfile
@@ -64,8 +64,8 @@ gem 'elasticsearch-rails'
 gem 'oauth2'
 
 # xlsx
-gem 'axlsx', '3.0.0.pre'
-gem 'axlsx_rails', '0.3.0'
+# gem 'axlsx', '3.0.0.pre'
+# gem 'axlsx_rails', '0.3.0'
 
 # state machine
 gem 'aasm'
diff --git a/public/react/src/modules/tpm/NewHeader.js b/public/react/src/modules/tpm/NewHeader.js
index 0251d318..79eccf2b 100644
--- a/public/react/src/modules/tpm/NewHeader.js
+++ b/public/react/src/modules/tpm/NewHeader.js
@@ -294,6 +294,7 @@ class NewHeader extends Component {
                                 </ul>
                             </div>
                         </li>
+						<li><a href="/libraries">教学案例</a></li>
                         <li><a href="/competitions">竞赛</a></li>
                         <li className={`${activeForums === true ? 'active' : ''}`}><a href="/forums">问答</a></li>
                         <li className={`${activeCourses === true ? 'active' : ''}`} style={{display:ecUrl===null||ecUrl===undefined||ecUrl===""?'none':'block'}}><a href={ecUrl}>{ecUrl===null||ecUrl===undefined||ecUrl===""?'':'认证'}</a></li>