diff --git a/en/sitemap.xml b/en/sitemap.xml
index 7e0027b24..8b90f7ed2 100644
--- a/en/sitemap.xml
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     <url>
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     <url>
          <loc>https://www.hello-algo.com/en/chapter_data_structure/number_encoding/</loc>
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     <url>
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     <url>
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     <url>
          <loc>https://www.hello-algo.com/en/chapter_preface/summary/</loc>
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diff --git a/en/sitemap.xml.gz b/en/sitemap.xml.gz
index 3456e456b..f10d85753 100644
Binary files a/en/sitemap.xml.gz and b/en/sitemap.xml.gz differ
diff --git a/index.html b/index.html
index d4f32901e..e38f940dc 100644
--- a/index.html
+++ b/index.html
@@ -408,7 +408,9 @@
                   内容清晰易懂，学习曲线平滑
                 </p>
                 <p class="intro-quote">
-                  "A picture is worth a thousand words."“一图胜千言”
+                  "A picture is worth a thousand words."
+                  <br/>
+                  “一图胜千言”
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             </div>
@@ -431,7 +433,9 @@
                   十余种编程语言，代码可视化运行
                 </p>
                 <p class="intro-quote">
-                  "Talk is cheap. Show me the code."“少吹牛，看代码”
+                  "Talk is cheap. Show me the code."
+                  <br/>
+                  “少吹牛，看代码”
                 </p>
               </div>
             </div>
@@ -452,7 +456,9 @@
                   欢迎讨论与提问，读者间携手共进
                 </p>
                 <p class="intro-quote">
-                  "Learning by teaching."“教学相长”
+                  "Learning by teaching."
+                  <br/>
+                  “教学相长”
                 </p>
               </div>
             </div>
diff --git a/sitemap.xml b/sitemap.xml
index 6e1973117..78f0bf204 100644
--- a/sitemap.xml
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          <loc>https://www.hello-algo.com/chapter_backtracking/</loc>
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