diff --git a/_people/xiong.md b/_people/xiong.md
index a47f792de40b360599542c662fb8fedebe88ba5b..4cf2e16e8738f1ecb39a97c177c807f28c457d15 100644
--- a/_people/xiong.md
+++ b/_people/xiong.md
@@ -11,7 +11,6 @@ projects:
   - moc
 ---
 
-Shale was a PhD student with the group. Shale defended his thesis: Parametric Operational 
-Semantics for Consistency Models in February 2020 and he is currently working 
-for [Arm Research]( https://www.arm.com/resources/research), Cambridge, as a 
+Shale was a PhD student with the group. Shale defended his thesis: [Parametric Operational 
+Semantics for Consistency Models (https://vtss.doc.ic.ac.uk/publications/Xiong2020Parametric.html) in February 2020 and he is currently working for [Arm Research]( https://www.arm.com/resources/research), Cambridge, as a 
 Research Engineer in their Security group.
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