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--- a/README.md
+++ b/README.md
@@ -1,12 +1,11 @@
 # CEPCSW
 
-CEPC offline software prototype based on Gaudi.
-
-The core part of this project (CEPCSW/FWCore) is taken from FCCSW/FWCore.
-Please refer to https://github.com/HEP-FCC/FCCSW
+CEPC offline software prototype based on [Key4hep](https://github.com/key4hep).
 
 ## Quick start
 
+Before run following commands, please make sure you setup the CVMFS:
+
 ```
 $ source /cvmfs/cepcsw.ihep.ac.cn/prototype/releases/externals/97.0.2/setup.sh
 $ git clone git@github.com:cepc/CEPCSW.git
@@ -32,10 +31,6 @@ $ ./run gaudirun.py '$EXAMPLESROOT/options/helloalg.py'
 
 * Service: Common Service
 
-* FWCore: Core Software Based on Gaudi
-
-* cepcenv: tools to help developers build packages
-
 ## Full Chain
 
 Detector simulation: