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new file mode 100644
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diff --git a/docs/assets/avatar/avatar_yanedie.jpg b/docs/assets/avatar/avatar_yanedie.jpg
new file mode 100644
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diff --git a/docs/assets/avatar/avatar_yuelinxin.jpg b/docs/assets/avatar/avatar_yuelinxin.jpg
new file mode 100644
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diff --git a/docs/chapter_graph/graph.md b/docs/chapter_graph/graph.md
index d42d38d44..3208dfaf7 100644
--- a/docs/chapter_graph/graph.md
+++ b/docs/chapter_graph/graph.md
@@ -54,7 +54,7 @@ $$
 
 邻接矩阵具有以下特性。
 
-- 顶点不能与自身相连，因此邻接矩阵主对角线元素没有意义。
+- 在简单图中，顶点不能与自身相连，此时邻接矩阵主对角线元素没有意义。
 - 对于无向图，两个方向的边等价，此时邻接矩阵关于主对角线对称。
 - 将邻接矩阵的元素从 $1$ 和 $0$ 替换为权重，则可表示有权图。
 
diff --git a/docs/index.html b/docs/index.html
index 965774d9a..146e0aefb 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -358,6 +358,13 @@
                         <br><sub>Go, C</sub>
                     </a>
                 </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/rongyi">
+                        <img class="profile-img" src="../assets/avatar/avatar_rongyi.jpg" alt="Reviewer: rongyi" />
+                        <br><b>rongyi</b>
+                        <br><sub>Rust</sub>
+                    </a>
+                </div>
             </div>
         </div>
 
diff --git a/en/docs/index.html b/en/docs/index.html
index 85ac7bdb0..07a650021 100644
--- a/en/docs/index.html
+++ b/en/docs/index.html
@@ -358,6 +358,90 @@
                         <br><sub>Go, C</sub>
                     </a>
                 </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/rongyi">
+                        <img class="profile-img" src="../assets/avatar/avatar_rongyi.jpg" alt="Reviewer: rongyi" />
+                        <br><b>rongyi</b>
+                        <br><sub>Rust</sub>
+                    </a>
+                </div>
+            </div>
+        </div>
+
+        <!-- translators -->
+        <div style="margin: 2em auto;">
+            <h3>English version reviewers</h3>
+            <div class="profile-div">
+                <div class="profile-cell">
+                    <a href="https://github.com/yuelinxin">
+                        <img class="profile-img" src="../assets/avatar/avatar_yuelinxin.jpg"
+                            alt="Reviewer: yuelinxin" />
+                        <br><b>yuelinxin</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/K3v123">
+                        <img class="profile-img" src="../assets/avatar/avatar_K3v123.jpg"
+                            alt="Reviewer: K3v123" />
+                        <br><b>K3v123</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/QiLOL">
+                        <img class="profile-img" src="../assets/avatar/avatar_QiLOL.jpg"
+                            alt="Reviewer: QiLOL" />
+                        <br><b>QiLOL</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/Phoenix0415">
+                        <img class="profile-img" src="../assets/avatar/avatar_Phoenix0415.jpg"
+                            alt="Reviewer: Phoenix0415" />
+                        <br><b>Phoenix0415</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/SamJin98">
+                        <img class="profile-img" src="../assets/avatar/avatar_SamJin98.jpg"
+                            alt="Reviewer: SamJin98" />
+                        <br><b>SamJin98</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/yanedie">
+                        <img class="profile-img" src="../assets/avatar/avatar_yanedie.jpg"
+                            alt="Reviewer: yanedie" />
+                        <br><b>yanedie</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/RafaelCaso">
+                        <img class="profile-img" src="../assets/avatar/avatar_RafaelCaso.jpg"
+                            alt="Reviewer: RafaelCaso" />
+                        <br><b>RafaelCaso</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/pengchzn">
+                        <img class="profile-img" src="../assets/avatar/avatar_pengchzn.jpg"
+                            alt="Reviewer: pengchzn" />
+                        <br><b>pengchzn</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/thomasq0">
+                        <img class="profile-img" src="../assets/avatar/avatar_thomasq0.jpg"
+                            alt="Reviewer: thomasq0" />
+                        <br><b>thomasq0</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/magentaqin">
+                        <img class="profile-img" src="../assets/avatar/avatar_magentaqin.jpg"
+                            alt="Reviewer: magentaqin" />
+                        <br><b>magentaqin</b>
+                    </a>
+                </div>
             </div>
         </div>
 
diff --git a/mkdocs.yml b/mkdocs.yml
index e51872f7d..6019dc26a 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -142,7 +142,6 @@ markdown_extensions:
 
 extra_javascript:
   - javascripts/mathjax.js
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
   - https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.min.js
   # - javascripts/katex.js 
   # - https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.16.7/katex.min.js  
diff --git a/zh-hant/docs/chapter_graph/graph.md b/zh-hant/docs/chapter_graph/graph.md
index 20c602c26..61a33c597 100644
--- a/zh-hant/docs/chapter_graph/graph.md
+++ b/zh-hant/docs/chapter_graph/graph.md
@@ -54,7 +54,7 @@ $$
 
 鄰接矩陣具有以下特性。
 
-- 頂點不能與自身相連，因此鄰接矩陣主對角線元素沒有意義。
+- 在簡單圖中，頂點不能與自身相連，此時鄰接矩陣主對角線元素沒有意義。
 - 對於無向圖，兩個方向的邊等價，此時鄰接矩陣關於主對角線對稱。
 - 將鄰接矩陣的元素從 $1$ 和 $0$ 替換為權重，則可表示有權圖。
 
diff --git a/zh-hant/docs/index.html b/zh-hant/docs/index.html
index de1acac46..72dce4b1c 100644
--- a/zh-hant/docs/index.html
+++ b/zh-hant/docs/index.html
@@ -358,6 +358,34 @@
                         <br><sub>Go, C</sub>
                     </a>
                 </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/rongyi">
+                        <img class="profile-img" src="../assets/avatar/avatar_rongyi.jpg" alt="Reviewer: rongyi" />
+                        <br><b>rongyi</b>
+                        <br><sub>Rust</sub>
+                    </a>
+                </div>
+            </div>
+        </div>
+
+        <!-- translators -->
+        <div style="margin: 2em auto;">
+            <h3>繁體版審閱者</h3>
+            <div class="profile-div">
+                <div class="profile-cell">
+                    <a href="https://github.com/Shyam-Chen">
+                        <img class="profile-img" src="../assets/avatar/avatar_Shyam-Chen.jpg"
+                            alt="Reviewer: Shyam-Chen" />
+                        <br><b>Shyam-Chen</b>
+                    </a>
+                </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/Dr-XYZ">
+                        <img class="profile-img" src="../assets/avatar/avatar_Dr-XYZ.jpg"
+                            alt="Reviewer: Dr-XYZ" />
+                        <br><b>Dr-XYZ</b>
+                    </a>
+                </div>
             </div>
         </div>