diff --git a/ml/readme.txt b/ml/readme.txt
index 02fd0c1ec..34fc3166b 100644
--- a/ml/readme.txt
+++ b/ml/readme.txt
@@ -1,5 +1,12 @@
 For Machine Learing Libs. We will incorporate some ML libs for query optimization in MySQL.
 (https://github.com/microsoft/LightGBM)
 
-using this to compile LightGBM:
-cmake .. -DBUILD_STATIC_LIB=ON  -DUSE_MPI=OFF -DUSE_OPENMP=OFF -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_BUILD_TYPE=Release
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+HOW TO USE LightGBM:
+0) to down a copy of LightGBM to your workshop, then start to build your own static lib files.
+
+1) to build a static libs, using this command to compile LightGBM (with the latest version if needed):
+cmake .. -DBUILD_STATIC_LIB=ON  -DUSE_MPI=OFF -DUSE_OPENMP=OFF -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_BUILD_TYPE=Release
+
+2) replace the .a files with the new compiled static lib files.
+
+3) re-compile ShannonBase with these static lib files.
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