8 files changed, 48 insertions, 11 deletions
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 73dc9f3..f2907a5 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,3 +1,3 @@
 {
-    "restructuredtext.preview.name": "docutils"
+    "restructuredtext.preview.name": "sphinx"
 }
 \ No newline at end of file
diff --git a/docs/source/COPYING.rst b/docs/source/COPYING.rst
index ea3bea4..cb94ff9 100644
--- a/docs/source/COPYING.rst
+++ b/docs/source/COPYING.rst
@@ -1 +1 @@
-.. include:: ../../COPYING
-\ No newline at end of file
+.. include:: ../../LICENSE
+\ No newline at end of file
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 27e20a6..602956e 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -25,10 +25,10 @@ AUTHORS = ",".join([f"{aut}" for aut in AUTHOR_TABLE])
 
 project = PROJECT_NAME  # "Infini"
 release = PROJECT_VERSION  # "latest"
-copyright = "2023-PRESENT, HydroRoll-Team & AICMUniversity."
+copyright = "2023-PRESENT, HydroRoll-Team."
 author = AUTHORS  # "Hsiang Nianian"
 
-html_title = "Nivis ❄"
+html_title = "HydroRollCore"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
@@ -46,8 +46,8 @@ extensions = [
 templates_path = ["_templates"]
 exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 extlinks = {
-    "issue": ("https://github.com/HydroRoll-Team/nivis-python/%s", "issue %s"),
-    "doc": ("https://nivis.hydroroll.team/en/latest/%s", "pages/%s"),
+    "issue": ("https://github.com/HydroRoll-Team/HydroRollCore/%s", "issue %s"),
+    "doc": ("https://core.hydroroll.team/en/latest/%s", "pages/%s"),
 }
 source_suffix = {
     ".rst": "restructuredtext",
@@ -65,7 +65,7 @@ gettext_uuid = True  # optional.
 html_theme = "furo"
 html_static_path = ["../_static"]
 _html_logo = (
-    "https://cdn.jsdelivr.net/gh/HydroRoll-Team/nivis-python@main/docs/_static/logo.png"
+    "https://cdn.jsdelivr.net/gh/HydroRoll-Team/HydroRollCore@main/docs/_static/logo.png"
 )
 html_favicon = _html_logo
 
@@ -76,19 +76,19 @@ html_css_files = [
 
 html_theme_options = {
     "announcement": "<em><a href='#'>documentation</a> is still under construction now, welcome any <a href='contributing.html'>contribution</a>!</em>",
-    "source_repository": "https://github.com/HydroRoll-Team/nivis-python/",
+    "source_repository": "https://github.com/HydroRoll-Team/HydroRollCore/",
     "source_branch": "main",
     "source_directory": "docs/source/",
     "footer_icons": [
         {
             "name": "GitHub",
-            "url": "https://github.com/HydroRoll-Team/nivis-python/",
+            "url": "https://github.com/HydroRoll-Team/HydroRollCore/",
             "html": "",
             "class": "fa-brands fa-github",
         },
         {
             "name": "Pypi",
-            "url": "https://pypi.org/project/nivis-python/",
+            "url": "https://pypi.org/project/hydro_roll_core/",
             "html": "",
             "class": "fa-brands fa-python",
         },
diff --git a/hydro_roll_core/__init__.py b/hydro_roll_core/__init__.py
index 0a04e23..12508e3 100644
--- a/hydro_roll_core/__init__.py
+++ b/hydro_roll_core/__init__.py
@@ -1 +1,2 @@
-from . import corelib
-\ No newline at end of file
+from . import corelib
+
diff --git a/hydro_roll_core/dev/__init__.py b/hydro_roll_core/development/__init__.py
index e69de29..e69de29 100644
--- a/hydro_roll_core/dev/__init__.py
+++ b/hydro_roll_core/development/__init__.py
diff --git a/hydro_roll_core/docs/__init__.py b/hydro_roll_core/document/__init__.py
index e69de29..e69de29 100644
--- a/hydro_roll_core/docs/__init__.py
+++ b/hydro_roll_core/document/__init__.py
diff --git a/hydro_roll_core/features/__init__.py b/hydro_roll_core/feature/__init__.py
index e69de29..e69de29 100644
--- a/hydro_roll_core/features/__init__.py
+++ b/hydro_roll_core/feature/__init__.py
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..4c28efa
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,36 @@
+#![allow(unused)]
+fn main() {
+    use pyo3::prelude::*;
+
+    #[pymodule]
+    fn parent_module(py: Python<'_>, m: &PyModule) -> PyResult<()> {
+        register_child_module(py, m)?;
+        Ok(())
+    }
+
+    fn register_child_module(py: Python<'_>, parent_module: &PyModule) -> PyResult<()> {
+        let child_module = PyModule::new(py, "child_module")?;
+        child_module.add_function(wrap_pyfunction!(func, child_module)?)?;
+        parent_module.add_submodule(child_module)?;
+        Ok(())
+    }
+
+    #[pyfunction]
+    fn func() -> String {
+        "func".to_string()
+    }
+
+    Python::with_gil(|py| {
+        use pyo3::types::IntoPyDict;
+        use pyo3::wrap_pymodule;
+        let parent_module = wrap_pymodule!(parent_module)(py);
+        let ctx = [("parent_module", parent_module)].into_py_dict(py);
+
+        py.run(
+            "assert parent_module.child_module.func() == 'func'",
+            None,
+            Some(&ctx),
+        )
+        .unwrap();
+    })
+}