brainpy · chaoming0625 · Oct 10, 2025 · Oct 10, 2025 · Oct 10, 2025
diff --git a/.github/labeler.yml b/.github/labeler.yml
@@ -4,7 +4,7 @@
 # Documentation
 documentation:
   - changed-files:
-    - any-glob-to-any-file: ['docs_version2_version2/**/*', 'docs_version2/**/*', '**/*.md', '**/*.rst']
+    - any-glob-to-any-file: ['docs_version2_version2/**/*', 'docs_classic/**/*', '**/*.md', '**/*.rst']
 
 # CI/CD
 ci-cd:

diff --git a/.gitignore b/.gitignore
@@ -24,34 +24,34 @@ extensions/cmake-build-debug
 BrainPyExamples/
 BrainModels/
 book/
-docs_version2/examples
-docs_version2/apis/jaxsetting.rst
-docs_version2/quickstart/data
+docs_classic/examples
+docs_classic/apis/jaxsetting.rst
+docs_classic/quickstart/data
 examples/recurrent_neural_network/neurogym
 develop/iconip_paper
 develop/benchmark/COBA/results
 develop/test
 develop/outputdir
-docs_version2/tutorial_math/data
-docs_version2/tutorial_simulation/data
+docs_classic/tutorial_math/data
+docs_classic/tutorial_simulation/data
 
-docs_version2/images/numpybrain_arch.pptx
-docs_version2/images/synapses_index.pdf
-docs_version2/images/synapses_index.xlsx
-docs_version2/images/neuron_structure.xlsx
-docs_version2/images/neuron_structure.pdf
-docs_version2/images/connection_methods.pptx
+docs_classic/images/numpybrain_arch.pptx
+docs_classic/images/synapses_index.pdf
+docs_classic/images/synapses_index.xlsx
+docs_classic/images/neuron_structure.xlsx
+docs_classic/images/neuron_structure.pdf
+docs_classic/images/connection_methods.pptx
 
 */_autosummary
 */generated
 
-docs_version2/apis/auto
-docs_version2/quickstart/.ipynb_checkpoints
+docs_classic/apis/auto
+docs_classic/quickstart/.ipynb_checkpoints
 
-docs_version2/apis/_autosummary
-docs_version2/apis/generated
-docs_version2/apis/math/generated
-docs_version2/apis/integrators/generated
+docs_classic/apis/_autosummary
+docs_classic/apis/generated
+docs_classic/apis/math/generated
+docs_classic/apis/integrators/generated
 
 develop/benchmark/COBA/brian2*
 develop/benchmark/COBA/annarchy*
@@ -65,20 +65,20 @@ develop/benchmark/CUBA/brian2*
 \#*\#
 *.pyc
 .DS_Store
-docs_version2/_autosummary
-docs_version2/generated
-docs_version2/_build
+docs_classic/_autosummary
+docs_classic/generated
+docs_classic/_build
 dist/
 build/
 *.egg-info
 .idea
-docs_version2/images/logo1.tif
-docs_version2/images/logo2.tif
-docs_version2/images/logo3.tif
-docs_version2/images/logo4.tif
+docs_classic/images/logo1.tif
+docs_classic/images/logo2.tif
+docs_classic/images/logo3.tif
+docs_classic/images/logo4.tif
 
 */__pycache__
-docs_version2/c4_examples/
+docs_classic/c4_examples/
 
 
 __pycache__/
@@ -148,7 +148,7 @@ instance/
 .scrapy
 
 # Sphinx documentation
-docs_version2/_build/
+docs_classic/_build/
 
 # PyBuilder
 .pybuilder/
@@ -216,25 +216,25 @@ dmypy.json
 # Cython debug symbols
 cython_debug/
 
-/docs_version2/apis/simulation/generated/
+/docs_classic/apis/simulation/generated/
 !/brainpy/dyn/tests/data/
 /examples/dynamics_simulation/data/
 /examples/training_snn_models/logs/T100_b64_lr0.001/
 /examples/training_snn_models/logs/
 /examples/training_snn_models/data/
-/docs_version2/tutorial_advanced/data/
+/docs_classic/tutorial_advanced/data/
 /my_tests/
 /examples/dynamics_simulation/Joglekar_2018_data/
-/docs_version2/apis/deprecated/generated/
+/docs_classic/apis/deprecated/generated/
 /bugs/
 /dev/
 /.claude/
-/docs_version2/_static/logos/
+/docs_classic/_static/logos/
 /docs/_static/logos/
 /docs/_build/
 /docs/changelog.md
-/docs_state_based/_build/
-/docs_state_based/_static/logos/
-/docs_state_based/changelog.md
-/examples_version2/dynamics_training/data/
+/docs_state/_build/
+/docs_state/_static/logos/
+/docs_state/changelog.md
+/examples_classic/dynamics_training/data/
 /docs/
diff --git a/README.md b/README.md
@@ -23,9 +23,6 @@ BrainPy is a flexible, efficient, and extensible framework for computational neu
 - **Ecosystem**: https://brainmodeling.readthedocs.io/
 
 
-``BrainPy>=3.0.0`` is rewritten based on [brainstate](https://github.com/chaobrain/brainstate) since August 2025, please learn [brainstate documentation](https://brainstate.readthedocs.io/) for the latest updates. 
-
-
 ## Installation
 
 BrainPy is based on Python (>=3.10) and can be installed on Linux (Ubuntu 16.04 or later), macOS (10.12 or later), and Windows platforms. 

diff --git a/brainpy/__init__.py b/brainpy/__init__.py
@@ -142,7 +142,7 @@
     ArrayCollector as ArrayCollector,
     Collector as Collector,
 )
-
+from brainpy import state
 
 from brainpy.deprecations import deprecation_getattr
 
@@ -151,6 +151,7 @@
 
 
 if __name__ == '__main__':
+    state
     connect
     initialize,  # weight initialization
     optim,  # gradient descent optimizers

diff --git a/brainpy/inputs/currents.py b/brainpy/inputs/currents.py
@@ -21,9 +21,12 @@
 
 __all__ = [
     'section_input',
-    'constant_input', 'constant_current',
-    'spike_input', 'spike_current',
-    'ramp_input', 'ramp_current',
+    'constant_input',
+    'constant_current',
+    'spike_input',
+    'spike_current',
+    'ramp_input',
+    'ramp_current',
     'wiener_process',
     'ou_process',
     'sinusoidal_input',

diff --git a/brainpy/state_based/__init__.py → brainpy/state/__init__.py b/brainpy/state_based/__init__.py → brainpy/state/__init__.py
@@ -43,3 +43,4 @@
 
 if __name__ == '__main__':
     mixin
+
diff --git a/brainpy/state_based/_base.py → brainpy/state/_base.py b/brainpy/state_based/_base.py → brainpy/state/_base.py
@@ -314,7 +314,7 @@ class Synapse(brainstate.nn.Dynamics):
 
     .. code-block:: python
 
-        >>> import brainpy.state_based as brainpy
+        >>> import brainpy.state as brainpy
         >>> import brainstate
         >>> import brainunit as u
         >>> import braintools
@@ -343,7 +343,7 @@ class Synapse(brainstate.nn.Dynamics):
 
     .. code-block:: python
 
-        >>> import brainpy.state_based as brainpy
+        >>> import brainpy.state as brainpy
         >>> import brainstate
         >>> import brainunit as u
         >>> import jax
@@ -368,7 +368,7 @@ class Synapse(brainstate.nn.Dynamics):
 
     .. code-block:: python
 
-        >>> import brainpy.state_based as brainpy
+        >>> import brainpy.state as brainpy
         >>> import brainstate
         >>> import brainunit as u
         >>>
@@ -409,7 +409,7 @@ class Synapse(brainstate.nn.Dynamics):
 
     .. code-block:: python
 
-        >>> import brainpy.state_based as brainpy
+        >>> import brainpy.state as brainpy
         >>> import brainstate
         >>> import brainunit as u
         >>>

diff --git a/brainpy/state_based/_base_test.py → brainpy/state/_base_test.py b/brainpy/state_based/_base_test.py → brainpy/state/_base_test.py
@@ -20,7 +20,7 @@
 import brainunit as u
 import jax.numpy as jnp
 
-from brainpy.state_based import Neuron, Synapse
+from brainpy.state import Neuron, Synapse
 
 
 class TestNeuronBaseClass(unittest.TestCase):

diff --git a/brainpy/state_based/_exponential.py → brainpy/state/_exponential.py b/brainpy/state_based/_exponential.py → brainpy/state/_exponential.py
diff --git a/brainpy/state_based/_inputs.py → brainpy/state/_inputs.py b/brainpy/state_based/_inputs.py → brainpy/state/_inputs.py
diff --git a/brainpy/state_based/_lif.py → brainpy/state/_lif.py b/brainpy/state_based/_lif.py → brainpy/state/_lif.py
@@ -74,12 +74,12 @@ class IF(Neuron):
 
     Examples
     --------
-    >>> import brainpy.state_based as brainpy
+    >>> import brainpy
     >>> import brainstate
     >>> import brainunit as u
     >>>
     >>> # Create an IF neuron layer with 10 neurons
-    >>> if_neuron = brainpy.IF(10, tau=8*u.ms, V_th=1.2*u.mV)
+    >>> if_neuron = brainpy.state.IF(10, tau=8*u.ms, V_th=1.2*u.mV)
     >>>
     >>> # Initialize the state
     >>> if_neuron.init_state(batch_size=1)
@@ -89,7 +89,7 @@ class IF(Neuron):
     >>>
     >>> # Create a network with IF neurons
     >>> network = brainstate.nn.Sequential([
-    ...     brainpy.IF(100, tau=5.0*u.ms),
+    ...     brainpy.state.IF(100, tau=5.0*u.ms),
     ...     brainstate.nn.Linear(100, 10)
     ... ])
 
@@ -207,7 +207,7 @@ class LIF(Neuron):
 
     Examples
     --------
-    >>> import brainpy.state_based as brainpy
+    >>> import brainpy.state as brainpy
     >>> import brainstate
     >>> import brainunit as u
     >>>
@@ -344,7 +344,7 @@ class LIFRef(Neuron):
 
     Examples
     --------
-    >>> import brainpy.state_based as brainpy
+    >>> import brainpy.state as brainpy
     >>> import brainstate
     >>> import brainunit as u
     >>>
@@ -512,7 +512,7 @@ class ALIF(Neuron):
 
     Examples
     --------
-    >>> import brainpy.state_based as brainpy
+    >>> import brainpy.state as brainpy
     >>> import brainstate
     >>> import brainunit as u
     >>>

diff --git a/brainpy/state_based/_lif_test.py → brainpy/state/_lif_test.py b/brainpy/state_based/_lif_test.py → brainpy/state/_lif_test.py
@@ -23,7 +23,7 @@
 import jax
 import jax.numpy as jnp
 
-from brainpy.state_based import IF, LIF, ALIF
+from brainpy.state import IF, LIF, ALIF
 
 
 class TestNeuron(unittest.TestCase):

diff --git a/brainpy/state_based/_misc.py → brainpy/state/_misc.py b/brainpy/state_based/_misc.py → brainpy/state/_misc.py
diff --git a/brainpy/state_based/_projection.py → brainpy/state/_projection.py b/brainpy/state_based/_projection.py → brainpy/state/_projection.py
diff --git a/brainpy/state_based/_readout.py → brainpy/state/_readout.py b/brainpy/state_based/_readout.py → brainpy/state/_readout.py
diff --git a/brainpy/state_based/_readout_test.py → brainpy/state/_readout_test.py b/brainpy/state_based/_readout_test.py → brainpy/state/_readout_test.py
@@ -21,7 +21,7 @@
 import brainunit as u
 import jax.numpy as jnp
 
-import brainpy.state_based as brainpy
+import brainpy.state as brainpy
 
 
 class TestReadoutModels(unittest.TestCase):

diff --git a/brainpy/state_based/_stp.py → brainpy/state/_stp.py b/brainpy/state_based/_stp.py → brainpy/state/_stp.py
diff --git a/brainpy/state_based/_synapse.py → brainpy/state/_synapse.py b/brainpy/state_based/_synapse.py → brainpy/state/_synapse.py
diff --git a/brainpy/state_based/_synapse_test.py → brainpy/state/_synapse_test.py b/brainpy/state_based/_synapse_test.py → brainpy/state/_synapse_test.py
@@ -21,7 +21,7 @@
 import jax.numpy as jnp
 import pytest
 
-from brainpy.state_based import Expon, STP, STD
+from brainpy.state import Expon, STP, STD
 
 
 class TestSynapse(unittest.TestCase):

diff --git a/brainpy/state_based/_synaptic_projection.py → brainpy/state/_synaptic_projection.py b/brainpy/state_based/_synaptic_projection.py → brainpy/state/_synaptic_projection.py
@@ -247,7 +247,7 @@ class AsymmetryGapJunction(Projection):
 
     Examples
     --------
-    >>> import brainpy.state_based as brainpy
+    >>> import brainpy.state as brainpy
     >>> import brainunit as u
     >>> import numpy as np
     >>>

diff --git a/brainpy/state_based/_synouts.py → brainpy/state/_synouts.py b/brainpy/state_based/_synouts.py → brainpy/state/_synouts.py
diff --git a/brainpy/state_based/_synouts_test.py → brainpy/state/_synouts_test.py b/brainpy/state_based/_synouts_test.py → brainpy/state/_synouts_test.py
@@ -20,7 +20,7 @@
 import jax.numpy as jnp
 import numpy as np
 
-import brainpy.state_based as brainpy
+import brainpy.state as brainpy
 
 
 class TestSynOutModels(unittest.TestCase):

diff --git a/docs/conf.py b/docs/conf.py
@@ -30,13 +30,13 @@
 build_version = os.environ.get('CURRENT_VERSION', 'v2')
 if build_version == 'v2':
     shutil.copytree(
-        os.path.join(os.path.dirname(__file__), '../docs_version2'),
+        os.path.join(os.path.dirname(__file__), '../docs_classic'),
         os.path.join(os.path.dirname(__file__)),
         dirs_exist_ok=True
     )
 else:
     shutil.copytree(
-        os.path.join(os.path.dirname(__file__), '../docs_state_based'),
+        os.path.join(os.path.dirname(__file__), '../docs_state'),
         os.path.join(os.path.dirname(__file__)),
         dirs_exist_ok=True
     )

diff --git a/docs_version2/FAQ.rst → docs_classic/FAQ.rst b/docs_version2/FAQ.rst → docs_classic/FAQ.rst
diff --git a/docs_version2/README.md → docs_classic/README.md b/docs_version2/README.md → docs_classic/README.md
@@ -39,7 +39,7 @@ import brainpy.math as bm
 This documentation is written in reStructuredText (RST) format and can be built using Sphinx:
 
 ```bash
-cd docs_version2
+cd docs_classic
 make html  # or use the appropriate build script
 ```
 

diff --git a/docs_version2/_static/DOGDecay.png → docs_classic/_static/DOGDecay.png b/docs_version2/_static/DOGDecay.png → docs_classic/_static/DOGDecay.png
diff --git a/..._version2/_static/E_I_balance_network.png → docs_classic/_static/E_I_balance_network.png b/..._version2/_static/E_I_balance_network.png → docs_classic/_static/E_I_balance_network.png
diff --git a/docs_version2/_static/HH-circuit.png → docs_classic/_static/HH-circuit.png b/docs_version2/_static/HH-circuit.png → docs_classic/_static/HH-circuit.png
diff --git a/...n2/_static/Hodgkin_Huxley_Limit_Cycle.png → ...ic/_static/Hodgkin_Huxley_Limit_Cycle.png b/...n2/_static/Hodgkin_Huxley_Limit_Cycle.png → ...ic/_static/Hodgkin_Huxley_Limit_Cycle.png
diff --git a/...n2/_static/Hodgkin_Huxley_bifurcation.png → ...ic/_static/Hodgkin_Huxley_bifurcation.png b/...n2/_static/Hodgkin_Huxley_bifurcation.png → ...ic/_static/Hodgkin_Huxley_bifurcation.png
diff --git a/...atic/Hodgkins_Huxley_bifurcation_by_I.gif → ...atic/Hodgkins_Huxley_bifurcation_by_I.gif b/...atic/Hodgkins_Huxley_bifurcation_by_I.gif → ...atic/Hodgkins_Huxley_bifurcation_by_I.gif
diff --git a/...sion2/_static/NG-RC-vs-Traditional-RC.png → ...assic/_static/NG-RC-vs-Traditional-RC.png b/...sion2/_static/NG-RC-vs-Traditional-RC.png → ...assic/_static/NG-RC-vs-Traditional-RC.png
diff --git a/...atic/Pinsky-Rinzel-model-illustration.png → ...atic/Pinsky-Rinzel-model-illustration.png b/...atic/Pinsky-Rinzel-model-illustration.png → ...atic/Pinsky-Rinzel-model-illustration.png
diff --git a/docs_version2/_static/align_post.png → docs_classic/_static/align_post.png b/docs_version2/_static/align_post.png → docs_classic/_static/align_post.png
diff --git a/docs_version2/_static/align_pre.png → docs_classic/_static/align_pre.png b/docs_version2/_static/align_pre.png → docs_classic/_static/align_pre.png
diff --git a/docs_version2/_static/all2all.png → docs_classic/_static/all2all.png b/docs_version2/_static/all2all.png → docs_classic/_static/all2all.png
diff --git a/...on2/_static/conductance_model_diagram.png → ...sic/_static/conductance_model_diagram.png b/...on2/_static/conductance_model_diagram.png → ...sic/_static/conductance_model_diagram.png
diff --git a/docs_version2/_static/csr_matrix.png → docs_classic/_static/csr_matrix.png b/docs_version2/_static/csr_matrix.png → docs_classic/_static/csr_matrix.png
diff --git a/docs_version2/_static/dmnet_diagram.png → docs_classic/_static/dmnet_diagram.png b/docs_version2/_static/dmnet_diagram.png → docs_classic/_static/dmnet_diagram.png
diff --git a/docs_version2/_static/echo_state_net.png → docs_classic/_static/echo_state_net.png b/docs_version2/_static/echo_state_net.png → docs_classic/_static/echo_state_net.png
diff --git a/docs_version2/_static/esn.png → docs_classic/_static/esn.png b/docs_version2/_static/esn.png → docs_classic/_static/esn.png
diff --git a/...ic/event_driven_matrix_multiplication.png → ...ic/event_driven_matrix_multiplication.png b/...ic/event_driven_matrix_multiplication.png → ...ic/event_driven_matrix_multiplication.png
diff --git a/...2/_static/example_synaptic_connection.png → ...c/_static/example_synaptic_connection.png b/...2/_static/example_synaptic_connection.png → ...c/_static/example_synaptic_connection.png
diff --git a/docs_version2/_static/feedback_node.png → docs_classic/_static/feedback_node.png b/docs_version2/_static/feedback_node.png → docs_classic/_static/feedback_node.png
diff --git a/docs_version2/_static/feedforward_node.png → docs_classic/_static/feedforward_node.png b/docs_version2/_static/feedforward_node.png → docs_classic/_static/feedforward_node.png
diff --git a/docs_version2/_static/fixed_post_num.png → docs_classic/_static/fixed_post_num.png b/docs_version2/_static/fixed_post_num.png → docs_classic/_static/fixed_post_num.png
diff --git a/docs_version2/_static/fixed_pre_num.png → docs_classic/_static/fixed_pre_num.png b/docs_version2/_static/fixed_pre_num.png → docs_classic/_static/fixed_pre_num.png
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diff --git a/docs_version2/_static/grid_N.png → docs_classic/_static/grid_N.png b/docs_version2/_static/grid_N.png → docs_classic/_static/grid_N.png
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diff --git a/docs_version2/_static/izhikevich.jfif → docs_classic/_static/izhikevich.jfif b/docs_version2/_static/izhikevich.jfif → docs_classic/_static/izhikevich.jfif
diff --git a/...version2/_static/izhikevich_patterns.jfif → ..._classic/_static/izhikevich_patterns.jfif b/...version2/_static/izhikevich_patterns.jfif → ..._classic/_static/izhikevich_patterns.jfif
diff --git a/.../_static/joint_and_separate_equations.png → .../_static/joint_and_separate_equations.png b/.../_static/joint_and_separate_equations.png → .../_static/joint_and_separate_equations.png
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diff --git a/...atic/ode_Midpoint_method_illustration.png → ...atic/ode_Midpoint_method_illustration.png b/...atic/ode_Midpoint_method_illustration.png → ...atic/ode_Midpoint_method_illustration.png
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diff --git a/.../_static/sparse_matrix_multiplication.png → .../_static/sparse_matrix_multiplication.png b/.../_static/sparse_matrix_multiplication.png → .../_static/sparse_matrix_multiplication.png
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diff --git a/docs_version2/apis/brainpy.dyn.channels.rst → docs_classic/apis/brainpy.dyn.channels.rst b/docs_version2/apis/brainpy.dyn.channels.rst → docs_classic/apis/brainpy.dyn.channels.rst
diff --git a/docs_version2/apis/brainpy.dyn.ions.rst → docs_classic/apis/brainpy.dyn.ions.rst b/docs_version2/apis/brainpy.dyn.ions.rst → docs_classic/apis/brainpy.dyn.ions.rst
diff --git a/docs_version2/apis/brainpy.dyn.neurons.rst → docs_classic/apis/brainpy.dyn.neurons.rst b/docs_version2/apis/brainpy.dyn.neurons.rst → docs_classic/apis/brainpy.dyn.neurons.rst
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diff --git a/docs_version2/apis/brainpy.dyn.outs.rst → docs_classic/apis/brainpy.dyn.outs.rst b/docs_version2/apis/brainpy.dyn.outs.rst → docs_classic/apis/brainpy.dyn.outs.rst
diff --git a/..._version2/apis/brainpy.dyn.plasticity.rst → docs_classic/apis/brainpy.dyn.plasticity.rst b/..._version2/apis/brainpy.dyn.plasticity.rst → docs_classic/apis/brainpy.dyn.plasticity.rst
diff --git a/...version2/apis/brainpy.dyn.projections.rst → ..._classic/apis/brainpy.dyn.projections.rst b/...version2/apis/brainpy.dyn.projections.rst → ..._classic/apis/brainpy.dyn.projections.rst
diff --git a/docs_version2/apis/brainpy.dyn.rates.rst → docs_classic/apis/brainpy.dyn.rates.rst b/docs_version2/apis/brainpy.dyn.rates.rst → docs_classic/apis/brainpy.dyn.rates.rst
diff --git a/docs_version2/apis/brainpy.dyn.synapses.rst → docs_classic/apis/brainpy.dyn.synapses.rst b/docs_version2/apis/brainpy.dyn.synapses.rst → docs_classic/apis/brainpy.dyn.synapses.rst
diff --git a/docs_version2/apis/brainpy.math.defaults.rst → docs_classic/apis/brainpy.math.defaults.rst b/docs_version2/apis/brainpy.math.defaults.rst → docs_classic/apis/brainpy.math.defaults.rst
diff --git a/..._version2/apis/brainpy.math.delayvars.rst → docs_classic/apis/brainpy.math.delayvars.rst b/..._version2/apis/brainpy.math.delayvars.rst → docs_classic/apis/brainpy.math.delayvars.rst
diff --git a/...ersion2/apis/brainpy.math.environment.rst → ...classic/apis/brainpy.math.environment.rst b/...ersion2/apis/brainpy.math.environment.rst → ...classic/apis/brainpy.math.environment.rst
diff --git a/docs_version2/apis/brainpy.math.event.rst → docs_classic/apis/brainpy.math.event.rst b/docs_version2/apis/brainpy.math.event.rst → docs_classic/apis/brainpy.math.event.rst
diff --git a/docs_version2/apis/brainpy.math.jitconn.rst → docs_classic/apis/brainpy.math.jitconn.rst b/docs_version2/apis/brainpy.math.jitconn.rst → docs_classic/apis/brainpy.math.jitconn.rst
diff --git a/docs_version2/apis/brainpy.math.modes.rst → docs_classic/apis/brainpy.math.modes.rst b/docs_version2/apis/brainpy.math.modes.rst → docs_classic/apis/brainpy.math.modes.rst
diff --git a/...rsion2/apis/brainpy.math.oo_transform.rst → ...lassic/apis/brainpy.math.oo_transform.rst b/...rsion2/apis/brainpy.math.oo_transform.rst → ...lassic/apis/brainpy.math.oo_transform.rst
diff --git a/...ersion2/apis/brainpy.math.op_register.rst → ...classic/apis/brainpy.math.op_register.rst b/...ersion2/apis/brainpy.math.op_register.rst → ...classic/apis/brainpy.math.op_register.rst
diff --git a/...rsion2/apis/brainpy.math.pre_syn_post.rst → ...lassic/apis/brainpy.math.pre_syn_post.rst b/...rsion2/apis/brainpy.math.pre_syn_post.rst → ...lassic/apis/brainpy.math.pre_syn_post.rst
diff --git a/docs_version2/apis/brainpy.math.random.rst → docs_classic/apis/brainpy.math.random.rst b/docs_version2/apis/brainpy.math.random.rst → docs_classic/apis/brainpy.math.random.rst
diff --git a/docs_version2/apis/brainpy.math.rst → docs_classic/apis/brainpy.math.rst b/docs_version2/apis/brainpy.math.rst → docs_classic/apis/brainpy.math.rst
diff --git a/docs_version2/apis/brainpy.math.sharding.rst → docs_classic/apis/brainpy.math.sharding.rst b/docs_version2/apis/brainpy.math.sharding.rst → docs_classic/apis/brainpy.math.sharding.rst
diff --git a/docs_version2/apis/brainpy.math.sparse.rst → docs_classic/apis/brainpy.math.sparse.rst b/docs_version2/apis/brainpy.math.sparse.rst → docs_classic/apis/brainpy.math.sparse.rst
diff --git a/..._version2/apis/brainpy.math.surrogate.rst → docs_classic/apis/brainpy.math.surrogate.rst b/..._version2/apis/brainpy.math.surrogate.rst → docs_classic/apis/brainpy.math.surrogate.rst
diff --git a/docs_version2/apis/brainpy.rst → docs_classic/apis/brainpy.rst b/docs_version2/apis/brainpy.rst → docs_classic/apis/brainpy.rst
diff --git a/docs_version2/apis/connect.rst → docs_classic/apis/connect.rst b/docs_version2/apis/connect.rst → docs_classic/apis/connect.rst
diff --git a/docs_version2/apis/deprecated/channels.rst → docs_classic/apis/deprecated/channels.rst b/docs_version2/apis/deprecated/channels.rst → docs_classic/apis/deprecated/channels.rst
diff --git a/docs_version2/apis/deprecated/layers.rst → docs_classic/apis/deprecated/layers.rst b/docs_version2/apis/deprecated/layers.rst → docs_classic/apis/deprecated/layers.rst
diff --git a/docs_version2/apis/deprecated/neurons.rst → docs_classic/apis/deprecated/neurons.rst b/docs_version2/apis/deprecated/neurons.rst → docs_classic/apis/deprecated/neurons.rst
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diff --git a/docs_version2/apis/deprecated/synouts.rst → docs_classic/apis/deprecated/synouts.rst b/docs_version2/apis/deprecated/synouts.rst → docs_classic/apis/deprecated/synouts.rst
diff --git a/docs_version2/apis/deprecated/synplast.rst → docs_classic/apis/deprecated/synplast.rst b/docs_version2/apis/deprecated/synplast.rst → docs_classic/apis/deprecated/synplast.rst
diff --git a/docs_version2/apis/dnn.rst → docs_classic/apis/dnn.rst b/docs_version2/apis/dnn.rst → docs_classic/apis/dnn.rst
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diff --git a/docs_version2/apis/losses.rst → docs_classic/apis/losses.rst b/docs_version2/apis/losses.rst → docs_classic/apis/losses.rst
diff --git a/docs_version2/apis/math.rst → docs_classic/apis/math.rst b/docs_version2/apis/math.rst → docs_classic/apis/math.rst
diff --git a/docs_version2/apis/measure.rst → docs_classic/apis/measure.rst b/docs_version2/apis/measure.rst → docs_classic/apis/measure.rst
diff --git a/docs_version2/apis/mixin.rst → docs_classic/apis/mixin.rst b/docs_version2/apis/mixin.rst → docs_classic/apis/mixin.rst
diff --git a/docs_version2/apis/optim.rst → docs_classic/apis/optim.rst b/docs_version2/apis/optim.rst → docs_classic/apis/optim.rst
diff --git a/docs_version2/apis/running.rst → docs_classic/apis/running.rst b/docs_version2/apis/running.rst → docs_classic/apis/running.rst
diff --git a/docs_version2/auto_generater.py → docs_classic/auto_generater.py b/docs_version2/auto_generater.py → docs_classic/auto_generater.py
diff --git a/docs_version2/brainpy-changelog.md → docs_classic/brainpy-changelog.md b/docs_version2/brainpy-changelog.md → docs_classic/brainpy-changelog.md
diff --git a/docs_version2/brainpylib-changelog.md → docs_classic/brainpylib-changelog.md b/docs_version2/brainpylib-changelog.md → docs_classic/brainpylib-changelog.md
diff --git a/...re_concept/brainpy_dynamical_system.ipynb → ...re_concept/brainpy_dynamical_system.ipynb b/...re_concept/brainpy_dynamical_system.ipynb → ...re_concept/brainpy_dynamical_system.ipynb
diff --git a/...e_concept/brainpy_transform_concept.ipynb → ...e_concept/brainpy_transform_concept.ipynb b/...e_concept/brainpy_transform_concept.ipynb → ...e_concept/brainpy_transform_concept.ipynb
diff --git a/...n2/core_concept/imgs/dynamical_system.png → ...ic/core_concept/imgs/dynamical_system.png b/...n2/core_concept/imgs/dynamical_system.png → ...ic/core_concept/imgs/dynamical_system.png
diff --git a/...pt/imgs/dynamical_system_and_dsrunner.png → ...pt/imgs/dynamical_system_and_dsrunner.png b/...pt/imgs/dynamical_system_and_dsrunner.png → ...pt/imgs/dynamical_system_and_dsrunner.png
diff --git a/...core_concept/imgs/net_with_two_linear.png → ...core_concept/imgs/net_with_two_linear.png b/...core_concept/imgs/net_with_two_linear.png → ...core_concept/imgs/net_with_two_linear.png
diff --git a/docs_version2/core_concept/index.rst → docs_classic/core_concept/index.rst b/docs_version2/core_concept/index.rst → docs_classic/core_concept/index.rst
diff --git a/docs_version2/core_concepts.rst → docs_classic/core_concepts.rst b/docs_version2/core_concepts.rst → docs_classic/core_concepts.rst
diff --git a/docs_version2/index.rst → docs_classic/index.rst b/docs_version2/index.rst → docs_classic/index.rst
@@ -114,11 +114,12 @@ Learn more
          :link: https://brainmodeling.readthedocs.io
 
 
-.. note::
-   BrainPy is still an experimental research project.
-   APIs may be changed over time. Please always keeps
-   in mind what BrainPy version you are using.
+   .. grid-item::
+      :columns: 6 6 6 4
 
+      .. card:: :material-regular:`settings;2em` ``brainpy.state`` module
+         :class-card: sd-text-black sd-bg-light
+         :link: https://brainpy-state.readthedocs.io/
 
 
 ----

diff --git a/docs_version2/quickstart/analysis.ipynb → docs_classic/quickstart/analysis.ipynb b/docs_version2/quickstart/analysis.ipynb → docs_classic/quickstart/analysis.ipynb
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diff --git a/...on2/tutorial_FAQs/brainpy_ecosystem.ipynb → ...sic/tutorial_FAQs/brainpy_ecosystem.ipynb b/...on2/tutorial_FAQs/brainpy_ecosystem.ipynb → ...sic/tutorial_FAQs/brainpy_ecosystem.ipynb
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diff --git a/..._FAQs/gotchas_of_brainpy_transforms.ipynb → ..._FAQs/gotchas_of_brainpy_transforms.ipynb b/..._FAQs/gotchas_of_brainpy_transforms.ipynb → ..._FAQs/gotchas_of_brainpy_transforms.ipynb
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diff --git a/...ial_FAQs/uniqueness_of-brainpy-math.ipynb → ...ial_FAQs/uniqueness_of-brainpy-math.ipynb b/...ial_FAQs/uniqueness_of-brainpy-math.ipynb → ...ial_FAQs/uniqueness_of-brainpy-math.ipynb
diff --git a/...on2/tutorial_advanced/1_advanced_math.rst → ...sic/tutorial_advanced/1_advanced_math.rst b/...on2/tutorial_advanced/1_advanced_math.rst → ...sic/tutorial_advanced/1_advanced_math.rst
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diff --git a/..._advanced/operator_custom_with_cupy.ipynb → ..._advanced/operator_custom_with_cupy.ipynb b/..._advanced/operator_custom_with_cupy.ipynb → ..._advanced/operator_custom_with_cupy.ipynb
diff --git a/...advanced/operator_custom_with_numba.ipynb → ...advanced/operator_custom_with_numba.ipynb b/...advanced/operator_custom_with_numba.ipynb → ...advanced/operator_custom_with_numba.ipynb
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diff --git a/...orial_building/build_network_models.ipynb → ...orial_building/build_network_models.ipynb b/...orial_building/build_network_models.ipynb → ...orial_building/build_network_models.ipynb
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