diff --git a/scripts/data_collector/yahoo/README.md b/scripts/data_collector/yahoo/README.md
index 6cc630e87..50f731e38 100644
--- a/scripts/data_collector/yahoo/README.md
+++ b/scripts/data_collector/yahoo/README.md
@@ -71,7 +71,7 @@ pip install -r requirements.txt
      - examples:
           ```bash
           # cn 1d data
-          python collector.py download_data --source_dir ~/.qlib/stock_data/source/cn_1d --start 2020-01-01 --end 2020-12-31 --delay 1 --interval 1d --region US
+          python collector.py download_data --source_dir ~/.qlib/stock_data/source/cn_1d --start 2020-01-01 --end 2020-12-31 --delay 1 --interval 1d --region CN
           # cn 1min data
           python collector.py download_data --source_dir ~/.qlib/stock_data/source/cn_1min --delay 1 --interval 1min --region CN
           # us 1d data