diff --git a/VOI&feature_extraction/README.md b/VOI&feature_extraction/README.md
index 63ac794..5007260 100644
--- a/VOI&feature_extraction/README.md
+++ b/VOI&feature_extraction/README.md
@@ -1 +1,3 @@
 #### Examples for VOIs and feature extraction.
+
+Because of the data size limitation, the VOIs can be seen in GitLab: https://gitlab.com/JZK00/NSCLC_prediction/-/tree/main/VOI&feature_extraction.