Update index.rst

Author: XiaogangHe

doc/source/index.rst

@@ -4,7 +4,7 @@ Welcome to the PREP-SHOT Documentation
 =======================================
 
 :Authors: `Zhanwei Liu <https://scholar.google.com/citations?user=Zub5y2IAAAAJ>`_ ([email protected]), `Xiaogang He <http://hydro.iis.u-tokyo.ac.jp/~hexg/>`_ ([email protected])
-:Contributors: `Bo Xu <http://faculty.dlut.edu.cn/xubo12/zh_CN/index.htm>`_ ([email protected]), `Jingkai Xie <http://null>`_ ([email protected]), `Shuyue Yan <http://null>`_ ([email protected]) , `Zhouyan Li <http://null>`_ ([email protected])
+:Contributors: `Bo Xu <http://faculty.dlut.edu.cn/xubo12/zh_CN/index.htm>`_ ([email protected]), `Jingkai Xie <http://null>`_ ([email protected]), `Shuyue Yan <http://null>`_ ([email protected]) , `Zhouyan Li <http://null>`_ ([email protected]), `Quan Yuan <http://null>`_ ([email protected]), `Kewei Zhang <http://null>`_ ([email protected]), `Yaozhong Cui <http://null>`_ ([email protected])
 :Organization: `National University of Singapore <https://nus.edu.sg/>`_
 :Version: |release|
 :Date: |today|