diff --git a/base_decoder/train/tools/data_preprocess/data_preprocess_SimChart9K.py b/base_decoder/train/tools/data_preprocess/data_preprocess_SimChart9K.py
index b45d638..1a45cf3 100644
--- a/base_decoder/train/tools/data_preprocess/data_preprocess_SimChart9K.py
+++ b/base_decoder/train/tools/data_preprocess/data_preprocess_SimChart9K.py
@@ -9,7 +9,7 @@
 from transformers import Pix2StructProcessor
 
 
-root = " " # this path needs to cover the root of your dataset
+root = "./SimChart9K" # this path needs to cover the root of your dataset
 save_root = " " # Save path
 os.makedirs(save_root, exist_ok=True)