diff --git a/docs/dev_install.rst b/docs/dev_install.rst
index 7eb413633002b..b4a1518192880 100644
--- a/docs/dev_install.rst
+++ b/docs/dev_install.rst
@@ -11,48 +11,92 @@ For precise build instructions on Windows, please check out `appveyor.yml <https
 
 Note that on Linux/OS X, ``clang`` is the only supported compiler for compiling the Taichi compiler. On Windows only MSVC supported.
 
-Installing Depedencies
-----------------------
+Installing Dependencies
+-----------------------
 
 - Make sure you are using Python 3.6/3.7/3.8
-- Execute
+- Install Python dependencies:
 
   .. code-block:: bash
 
-    python3 -m pip install --user setuptools astor pybind11 numpy
-    python3 -m pip install --user pytest pytest-rerunfailures pytest-xdist pytest-cov
-    python3 -m pip install --user GitPython coverage autograd Pillow yapf
-    python3 -m pip install --user scipy psutil opencv-python astpretty
+    python3 -m pip install --user setuptools astpretty astor pybind11 Pillow
+    python3 -m pip install --user pytest pytest-rerunfailures pytest-xdist yapf
+    python3 -m pip install --user numpy GitPython coverage colorama autograd
 
-* (If on Ubuntu) Execute ``sudo apt install libtinfo-dev clang-8``. (``clang-7`` should work as well).
+- Make sure you have ``clang`` with version >= 7
 
-* (If on other Linux distributions) Please build clang 8.0.1 from source:
+  * On Windows: Download ``clang-8`` via `this link <https://releases.llvm.org/8.0.0/LLVM-8.0.0-win64.exe>`_.
+    Make sure you add the ``bin`` folder containing ``clang.exe`` to the ``PATH`` environment variable.
 
-  .. code-block:: bash
+  * On OS X: you don't need to do anything.
 
-    wget https://github.com/llvm/llvm-project/releases/download/llvmorg-8.0.1/cfe-8.0.1.src.tar.xz
-    tar xvJf cfe-8.0.1.src.tar.xz
-    cd cfe-8.0.1.src
-    mkdir build
-    cd build
-    cmake ..
-    make -j 8
-    sudo make install
+  * On Ubuntu, execute ``sudo apt install libtinfo-dev clang-8``.
 
+  * On other Linux distributions, please build clang 8.0.1 from source:
 
-- Make sure you have LLVM 8.0.1 built from source. To do so:
+    .. code-block:: bash
 
-  .. code-block:: bash
+        wget https://github.com/llvm/llvm-project/releases/download/llvmorg-8.0.1/cfe-8.0.1.src.tar.xz
+        tar xvJf cfe-8.0.1.src.tar.xz
+        cd cfe-8.0.1.src
+        mkdir build
+        cd build
+        cmake ..
+        make -j 8
+        sudo make install
+
+
+- Make sure you have LLVM 8.0.1/10.0.0. Note that Taichi uses a customized LLVM so the pre-built binaries from the LLVM official website or other sources probably doesn't work.
+  Here we provide LLVM 8.0.1 binaries customized for Taichi, which may or may not work depending on your system environment:
+  `Linux <https://github.com/yuanming-hu/taichi_assets/releases/download/llvm8/taichi-llvm-8.0.1-linux-x64.zip>`_,
+  `OS X <https://github.com/yuanming-hu/taichi_assets/releases/download/llvm8/taichi-llvm-8.0.1.zip>`_,
+  `Windows <https://github.com/yuanming-hu/taichi_assets/releases/download/llvm8/taichi-llvm-8.0.1-msvc2017.zip>`_.
+
+   If the downloaded LLVM does not work, please build from source:
+
+  * On Linux or OS X:
+
+      .. code-block:: bash
+
+        wget https://github.com/llvm/llvm-project/releases/download/llvmorg-8.0.1/llvm-8.0.1.src.tar.xz
+        tar xvJf llvm-8.0.1.src.tar.xz
+        cd llvm-8.0.1.src
+        # For LLVM 10.0.0:
+        #     wget https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/llvm-10.0.0.src.tar.xz
+        #     tar xvJf llvm-10.0.0.src.tar.xz
+        #     cd llvm-10.0.0.src
+        mkdir build
+        cd build
+        cmake .. -DLLVM_ENABLE_RTTI:BOOL=ON -DBUILD_SHARED_LIBS:BOOL=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" -DLLVM_ENABLE_ASSERTIONS=ON
+        # If you are building on NVIDIA Jetson TX2, use -DLLVM_TARGETS_TO_BUILD="ARM;NVPTX"
+
+        make -j 8
+        sudo make install
+
+        # Check your LLVM installation
+        llvm-config --version # You should get 8.0.1 or 10.0.0
+
+  * On Windows:
+
+    .. code-block:: bash
+
+      # LLVM 8.0.1 + MSVC 2017
+      cmake .. -G"Visual Studio 15 2017 Win64"  -DLLVM_ENABLE_RTTI:BOOL=ON -DBUILD_SHARED_LIBS:BOOL=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" -DLLVM_ENABLE_ASSERTIONS=ON -Thost=x64 -DLLVM_BUILD_TESTS:BOOL=OFF -DCMAKE_INSTALL_PREFIX=installed
+
+      # LLVM 10.0.0 + MSVC 2019
+      cmake .. -G"Visual Studio 16 2019" -A x64  -DLLVM_ENABLE_RTTI:BOOL=ON -DBUILD_SHARED_LIBS:BOOL=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" -DLLVM_ENABLE_ASSERTIONS=ON -Thost=x64 -DLLVM_BUILD_TESTS:BOOL=OFF -DCMAKE_INSTALL_PREFIX=installed
+
+    - Then open ``LLVM.sln`` and use Visual Studio 2017+ to build.
+    - Please make sure you are using the ``Release`` configuration. After building the ``INSTALL`` project (under folder ``CMakePredefinedTargets`` in the Solution Explorer window).
+    - If you use MSVC 2019, **make sure you use C++17** for the ``INSTALL`` project.
+    - After the build is complete, find your LLVM binaries and headers in ``build/installed``.
+
+    Please add ``build/installed/bin`` to ``PATH``.
+    Later, when you build Taichi using ``CMake``, set ``LLVM_DIR`` to ``build/installed/lib/cmake/llvm``.
+
+- On Windows, if you use the pre-built LLVM for Taichi, please add ``$LLVM_FOLDER/bin`` to ``PATH``.
+  Later, when you build Taichi using ``CMake``, set ``LLVM_DIR`` to ``$LLVM_FOLDER/lib/cmake/llvm``.
 
-    wget https://github.com/llvm/llvm-project/releases/download/llvmorg-8.0.1/llvm-8.0.1.src.tar.xz
-    tar xvJf llvm-8.0.1.src.tar.xz
-    cd llvm-8.0.1.src
-    mkdir build
-    cd build
-    cmake .. -DLLVM_ENABLE_RTTI:BOOL=ON -DBUILD_SHARED_LIBS:BOOL=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" -DLLVM_ENABLE_ASSERTIONS=ON
-    # If you are building on NVIDIA Jetson TX2, use -DLLVM_TARGETS_TO_BUILD="ARM;NVPTX"
-    make -j 8
-    sudo make install
 
 Setting up CUDA (optional)
 --------------------------
@@ -102,16 +146,6 @@ Setting up Taichi for development
 - Check out ``examples`` for runnable examples. Run them with ``python3``.
 
 
-
-Prebuilt LLVM for Windows CI
-----------------------------
-
-.. code-block:: bash
-
-  cmake .. -G"Visual Studio 15 2017 Win64"  -DLLVM_ENABLE_RTTI:BOOL=ON -DBUILD_SHARED_LIBS:BOOL=OFF -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" -DLLVM_ENABLE_ASSERTIONS=ON -Thost=x64 -DLLVM_BUILD_TESTS:BOOL=OFF -DCMAKE_INSTALL_PREFIX=installed
-
-Then use Visual Studio (Build Tools) to build, after which build the ``INSTALL`` project (under folder "CMakePredefinedTargets"). Once the build completes, find your LLVM binaries/headers in `build/include`.
-
 Troubleshooting
 ---------------