diff --git a/_layouts/bib.liquid b/_layouts/bib.liquid
index 0ffb853..72b7a41 100644
--- a/_layouts/bib.liquid
+++ b/_layouts/bib.liquid
@@ -151,7 +151,7 @@
         </a>
       {% endif %} {% endcomment %}
        {% if page.title == "About" and entry.abstract %}
-        [<a class="abstract" role="button" style="color: var(--global-theme-color);">TL;DR</a>]
+        [<a class="abstract" role="button" style="color: var(--global-theme-color);">TLDR</a>]
       {% endif %} 
       {% if entry.arxiv %}
         [<a href="http://arxiv.org/abs/{{ entry.arxiv }}" class="" role="button">arXiv</a>]
@@ -279,7 +279,7 @@
 
     {% if page.title == "About" and entry.abstract %}
       <!-- Hidden abstract block -->
-      <div class="abstract hidden">
+      <div class="abstract hidden" style="font-size: 1rem;">
         <p>{{ entry.abstract }}</p>
       </div>
     {% endif %}
diff --git a/_pages/about.md b/_pages/about.md
index 8923062..f88b611 100644
--- a/_pages/about.md
+++ b/_pages/about.md
@@ -10,7 +10,7 @@ profile:
   image_circular: false # crops the image to make it circular
   more_info: 
   bios: >
-    <p>I am currently a Professor at Gaoling School of Artificial Intelligence, Renmin University of China.  I worked as a Professor (Jul 2019 - Jul 2020), and as an Associated Professor (Sep 2014 - Jun 2019) at School of Information, Renmin University of China. I was a Postdoc researcher at <a title="http://www.madalgo.au.dk/" href="http://www.madalgo.au.dk/">MADALGO (Center for Massive Data Algorithmics)</a>, <a title="http://www.au.dk/en/" href="http://www.au.dk/en/">Aarhus University</a>, from September 2012 to August 2014, working with <a title="http://www.madalgo.au.dk/~large/" href="http://www.madalgo.au.dk/%7Elarge/">Prof. Lars Arge</a>. I was a Postdoc at the <a class="class1" title="http://www.cse.ust.hk/" href="http://www.cse.ust.hk/">Department of Computer Science and <span>Engineering</span></a>, <a class="class2" title="http://www.ust.hk/" href="http://www.ust.hk/">HKUST</a>, from March to August 2012. I obtained my PhD at <a title="http://www.cse.ust.hk/" href="http://www.cse.ust.hk/">Department of Computer Science and Engineering</a>, <a title="http://www.ust.hk/" href="http://www.ust.hk/">HKUST</a> in March 2012. My supervisor is <a title="http://www.cse.ust.hk/~yike/" href="http://www.cse.ust.hk/~yike/">Prof. Ke Yi</a>. Before that, I received my B.Sc. Degree in the <a title="http://www.math.pku.edu.cn:8000/en/" href="http://www.math.pku.edu.cn:8000/en/">School of Mathematical Sciences</a> at <a title="http://www.pku.edu.cn/" href="http://www.pku.edu.cn/">Peking University</a> in June 2008.</p>
+    <p>I am currently a Professor at Gaoling School of Artificial Intelligence, Renmin University of China.  I worked as a Professor (Jul 2019 - Jul 2020), and as an Associated Professor (Sep 2014 - Jun 2019) at School of Information, Renmin University of China. I was a Postdoc researcher at <a title="http://www.madalgo.au.dk/" href="http://www.madalgo.au.dk/">MADALGO (Center for Massive Data Algorithmics)</a>, <a title="http://www.au.dk/en/" href="http://www.au.dk/en/">Aarhus University</a>, from September 2012 to August 2014, working with <a title="http://www.madalgo.au.dk/~large/" href="http://www.madalgo.au.dk/%7Elarge/">Prof. Lars Arge</a>. I was a Postdoc researcher at the <a class="class1" title="http://www.cse.ust.hk/" href="http://www.cse.ust.hk/">Department of Computer Science and <span>Engineering</span></a>, <a class="class2" title="http://www.ust.hk/" href="http://www.ust.hk/">HKUST</a>, from March to August 2012. I obtained my PhD at <a title="http://www.cse.ust.hk/" href="http://www.cse.ust.hk/">Department of Computer Science and Engineering</a>, <a title="http://www.ust.hk/" href="http://www.ust.hk/">HKUST</a> in March 2012. My supervisor is <a title="http://www.cse.ust.hk/~yike/" href="http://www.cse.ust.hk/~yike/">Prof. Ke Yi</a>. Before that, I received my B.Sc. Degree in the <a title="http://www.math.pku.edu.cn:8000/en/" href="http://www.math.pku.edu.cn:8000/en/">School of Mathematical Sciences</a> at <a title="http://www.pku.edu.cn/" href="http://www.pku.edu.cn/">Peking University</a> in June 2008.</p>
 
 news: true # includes a list of news items
 selected_papers: true # includes a list of papers marked as "selected={true}"
diff --git a/_pages/profiles.md b/_pages/profiles.md
index 9962bf7..879e807 100644
--- a/_pages/profiles.md
+++ b/_pages/profiles.md
@@ -165,7 +165,7 @@ students:
     image: yu_liu.jpg
     link: https://faculty.bjtu.edu.cn/9759/
     more_info: >
-      2014-2018, Lecturer of Beijing Jiaotong University<br>Dissertation: <cite>Structural-Based Approximate Algorithms for Massive Graphs</cite> (基于网络结构的大图近似算法)<br>(co-supervised with <a href="https://www.cs.helsinki.fi/u/jilu/">Jiaheng Lu</a>), Former Peking University Boya Postdoc Fellowship (Outstanding Postdoc)
+      2014-2018, Lecturer of Beijing Jiaotong University<br>Dissertation: <cite>Structural-Based Approximate Algorithms for Massive Graphs</cite> (基于网络结构的大图近似算法)<br>(co-supervised with <a href="https://www.cs.helsinki.fi/u/jilu/">Jiaheng Lu</a>), Former Peking University Boya Postdoc Fellowship (Outstanding Postdoc Researcher)
     category: Graduated PhD Students
   - name: Hanzhi Wang
     image: hanzhi.jpg
diff --git a/assets/img/students/yuzhang.jpg b/assets/img/students/yuzhang.jpg
index 98342af..81c1053 100644
Binary files a/assets/img/students/yuzhang.jpg and b/assets/img/students/yuzhang.jpg differ