diff --git a/LICENSE b/LICENSE
new file mode 100644
index 00000000..2c746540
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Changgang Li
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index ce9a6ab7..5c6554e5 100644
--- a/README.md
+++ b/README.md
@@ -1,26 +1,44 @@
 Simulation Toolkit for Electrical Power Systems
+
 Maintainer: Changgang Li <lichgang@sdu.edu.cn>
-Please go to http://steps.drli.group:380 for documentation.
+
+Please go to http://steps.drli.group:310 for documentation.
 
 How to build:
-1) Select which LA solver is to be used
+1) Select which Linear Algebra solver is to be used
+
 Open STEPS.cbp and go to header/basic/sparse_matrix_define.h. Comment the solver you don't want to use.
+
 For example, if you want to keep only c_sparse, comment out umfpack and klu.
+
 Then go to source/basic/sparse_matrix_klu.cpp and umfpack.cpp, disable 'compile' and 'link' options of the two files.
-2) Go compile the LS solver.
+
+2) Go compile the Linear Algebra solver.
+
 For example, open csparse.cbp, and compile CSparse. The target should be 'static library'
+
 3) Go compile the CppTest.
+
 Open cpptest.cbp, and compile CppTest. The target should be 'static library'
+
 4) Build STEPS
+
 In the linker settings, you should include the above two static libraries libCSparse.a and libCpptest.a.
+
 Then compile the STEPS.
+
 5) If you want to build a 64bit version, use 64 bit MinGW and select the X64 version compiler.
 
 If you want to compile a complete version, follow the steps:
+
 1) Compile BLAS as static library
+
 2) Compile UMFPACK as static library
+
 3) Compile CSparse as static library
+
 4) Compile CppTest as static library
+
 5) Compile STEPS as dynamic library or exectuable file. Include libUMFPACK.a, libBLAS.a, libCSparse.a, and libCpptest.a. Put libBLAS.a after libUMFPACK.a.
 
 When compiling in Windows, remove -no-pie and -lgfortran options and remove libKLU.a, libBLAS.a, libUMFPACK.a