diff --git a/paper/md_paper/paper.md b/paper/md_paper/paper.md
index 13509bf..9583cf0 100644
--- a/paper/md_paper/paper.md
+++ b/paper/md_paper/paper.md
@@ -63,6 +63,6 @@ While there exists many open source packages for species distribution modeling (
 
 # Acknowledgements
 
-This project was based upon work supported by National Natural Science Foundation of China grants 32125005 (to X.Z.), 32270455 (to Z.G.), CAS Project for Young Scientists in Basic Research (YSBR-097 to X.Z. and Z.G.). We thank Dr. Daniel Fink at Cornell Lab of Ornithology for the R scripts of STEM model and QuadTree which inspired our implementation in Python.
+This project was based upon work supported by National Natural Science Foundation of China grants 32125005 (to X.Z.), 32270455 (to Z.G.), CAS Project for Young Scientists in Basic Research (YSBR-097 to X.Z. and Z.G.). We thank Dr. Daniel Fink at Cornell Lab of Ornithology for the R scripts of STEM model and QuadTree which inspired our implementation in Python. We thank Dr. Taxing Zhang for advice and software test.
 
 # References