diff --git a/project-pages/sur2f.html b/project-pages/sur2f.html
index 4917eb9..3dd5fc5 100644
--- a/project-pages/sur2f.html
+++ b/project-pages/sur2f.html
@@ -70,9 +70,9 @@ <h5>
                             <br>
                             <sup>2</sup>School of Data Science, The Chinese University of Hong Kong, Shenzhen</p>
                         <p>
-                            <a class="btn btn-secondary btn-lg" href="XXX"
+                            <a class="btn btn-secondary btn-lg" href="https://arxiv.org/pdf/XXX.pdf"
                                 role="button">Paper</a>
-                            <a class="btn btn-secondary btn-lg" href="XXX"
+                            <a class="btn btn-secondary btn-lg" href="TODO"
                                 role="button">Code</a>
                             <!-- <a class="btn btn-secondary btn-lg" href="https://www.dropbox.com/sh/5tam07ai8ch90pf/AADniBT3dmAexvm_J1oL__uoa" role="button">Data</a> </p> -->