diff --git a/README.md b/README.md
index d56e18a..53d76df 100644
--- a/README.md
+++ b/README.md
@@ -37,12 +37,14 @@ The official documentation is hosted on Read the Docs: [https://brainstate.readt
 
 ## See also the BDP ecosystem
 
-- [``brainpy``](https://github.com/brainpy/BrainPy): The solution for the general-purpose brain dynamics programming.
+- [``brainstate``](https://github.com/brainpy/brainstate): A ``State``-based transformation system for brain dynamics programming.
 
-- [``brainstate``](https://github.com/brainpy/brainstate): The core system for the next generation of BrainPy framework.
+- [``brainunit``](https://github.com/brainpy/brainunit): The unit system for brain dynamics programming.
 
-- [``braintools``](https://github.com/brainpy/braintools): The tools for the brain dynamics simulation and analysis.
+- [``braintaichi``](https://github.com/brainpy/braintaichi): Leveraging Taichi Lang to customize brain dynamics operators.
 
-- [``brainscale``](https://github.com/brainpy/brainscale): The scalable online learning for biological spiking neural networks.
+- [``brainscale``](https://github.com/brainpy/brainscale): The scalable online learning framework for biological neural networks.
+
+- [``braintools``](https://github.com/brainpy/braintools): The toolbox for the brain dynamics simulation, training and analysis.
 
 
diff --git a/docs/index.rst b/docs/index.rst
index 2da5fb8..264c261 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -33,7 +33,7 @@ Installation
 
        .. code-block:: bash
 
-          pip install -U brainstate[tpu]
+          pip install -U brainstate[tpu] -f https://storage.googleapis.com/jax-releases/libtpu_releases.html
 
 
 ----
@@ -43,13 +43,15 @@ See also the BDP ecosystem
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 
-- `brainpy <https://github.com/brainpy/BrainPy>`_: The solution for the general-purpose brain dynamics programming.
+- `brainstate <https://github.com/brainpy/brainstate>`_: A ``State``-based transformation system for brain dynamics programming.
 
-- `brainstate <https://github.com/brainpy/brainstate>`_: The ``State``-based transformation system for brain dynamics programming.
+- `brainunit <https://github.com/brainpy/brainunit>`_: The unit system for brain dynamics programming.
 
-- `braintools <https://github.com/brainpy/braintools>`_: The tools for the brain dynamics simulation and analysis.
+- `braintaichi <https://github.com/brainpy/braintaichi>`_: Leveraging Taichi Lang to customize brain dynamics operators.
 
-- `brainscale <https://github.com/brainpy/brainscale>`_: The scalable online learning for biological spiking neural networks.
+- `brainscale <https://github.com/brainpy/brainscale>`_: The scalable online learning framework for biological neural networks.
+
+- `braintools <https://github.com/brainpy/braintools>`_: The toolbox for the brain dynamics simulation, training and analysis.