diff --git a/README.md b/README.md
index c53d1f6..e2f9ca9 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,4 @@
-2023/03/01
-Hsiang-He Lee (lee1061@llnl.gov)
-
-E3SM chemistry diagnostic package version1.0 (ChemDyg v1.0) is designed for E3SM chemistry development. There are total 11 types of plot and 3 types of table for model-to-model and model-to-observation comparison.
+E3SM chemistry diagnostic package (ChemDyg) is designed for E3SM chemistry development. There are total 11 types of plot and 3 types of table for model-to-model and model-to-observation comparison.
 
 Index page and example figures:
 https://web.lcrc.anl.gov/public/e3sm/diagnostic_output/ac.lee1061/20220914.PAN.MZThet.v2.LR.bi-grid.amip.chemUCI_Linozv3/e3sm_chem_diags/plots/
@@ -9,19 +6,12 @@ https://web.lcrc.anl.gov/public/e3sm/diagnostic_output/ac.lee1061/20220914.PAN.M
 ChemDyg is executed by zppy, which is a post-processing toolchain for E3SM written in Python (https://github.com/E3SM-Project/zppy).
 
 *How to run ChemDyg via zppy script on chrysalis?
-1. Setup environment 
->source /gpfs/fs1/soft/chrysalis/manual/anaconda3/2020.11/etc/profile.d/conda.sh
->conda activate zppy_dev_chem
-
-2. Download zppy and ChemDyg on your working folder 
-
-3. Modify .cfg run script and then
->zppy -c ChemDyg_example_script.cfg
-
-
-** Additional python script "DEBUG_chem_diags_timestep.py" is designed for debug purpose. The user gives the path of E3SM .h0 and .h1 outputs and other necessary information. The script will generate chem tendency table for each timestep.
-
-See [documentation](https://e3sm-project.github.io/zppy) for more details.
+```
+source /lcrc/soft/climate/e3sm-unified/load_latest_e3sm_unified_chrysalis.sh
+wget https://raw.githubusercontent.com/E3SM-Project/ChemDyg/main/ChemDyg_example_script.cfg
+zppy -c ChemDyg_example_script.cfg
+```
+**Note that the users need to change the'e3sm_unified' path on different zppy-supported machines (https://e3sm-project.github.io/zppy/_build/html/main/getting_started.html#activate-e3sm-unified-environment). 
 
 ## License