diff --git a/data/category-scholar-!cn b/data/category-scholar-!cn
index af8c10fa..68170b2e 100644
--- a/data/category-scholar-!cn
+++ b/data/category-scholar-!cn
@@ -130,6 +130,7 @@ medrxiv.org
 morganclaypool.com
 nature.com
 naturemag.org
+ncbi.nlm.nih.gov
 ncl.edu.tw
 nejm.org
 neurology.org