diff --git a/tests/test_guanghan_topology_demo.py b/tests/test_guanghan_topology_demo.py
new file mode 100644
index 0000000..0c9b58e
--- /dev/null
+++ b/tests/test_guanghan_topology_demo.py
@@ -0,0 +1,94 @@
+from __future__ import annotations
+
+import re
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+HTML_PATH = ROOT / "data" / "wiki" / "guanghan_topology_demo.html"
+TIMELINE_PATH = ROOT / "user_input" / "广寒计划" / "Timeline.md"
+
+CLICKABLE_MODULES = {
+    "core",
+    "habitat-1",
+    "habitat-2",
+    "greenhouse",
+    "laboratory",
+    "power-node",
+    "power-north",
+    "power-east",
+    "power-south",
+    "power-west",
+    "wugang-2",
+    "binglun-1",
+    "binglun-2",
+    "binglun-3",
+}
+
+
+class GuanghanTopologySourceTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.html = HTML_PATH.read_text(encoding="utf-8")
+        timeline = TIMELINE_PATH.read_text(encoding="utf-8")
+        cls.ghc05 = timeline.split("GHC-05任务", 1)[1].split("JC-02任务", 1)[0]
+
+    def test_clickable_module_inventory_is_exact(self) -> None:
+        found = set(re.findall(r'data-module="([^"]+)"', self.html))
+        self.assertEqual(found, CLICKABLE_MODULES)
+
+    def test_connection_inventory_matches_approved_topology(self) -> None:
+        self.assertEqual(self.html.count('data-connection="pressurized"'), 2)
+        self.assertIn('data-link="wugang-2--greenhouse"', self.html)
+        self.assertIn('data-link="habitat-1--power-north"', self.html)
+        self.assertNotIn("perimeter-corridor", self.html)
+
+    def test_walkways_and_radiators_are_not_clickable(self) -> None:
+        self.assertNotRegex(
+            self.html,
+            r'<(?:line|path|rect)[^>]+data-connection="pressurized"[^>]+data-module=',
+        )
+        self.assertNotRegex(
+            self.html,
+            r'<(?:g|rect)[^>]+class="[^"]*radiator[^"]*"[^>]+data-module=',
+        )
+
+    def test_future_extensions_exist_only_as_source_comments(self) -> None:
+        comments = "\n".join(re.findall(r"<!--(.*?)-->", self.html, flags=re.S))
+        visible_source = re.sub(r"<!--.*?-->", "", self.html, flags=re.S)
+        for direction in ("north", "east", "west"):
+            self.assertIn(f"FUTURE_EXPANSION_ANCHOR:{direction}", comments)
+        self.assertNotIn("未来北部十字结构", visible_source)
+        self.assertNotIn("未来东部十字结构", visible_source)
+        self.assertNotIn("未来西部十字结构", visible_source)
+
+    def test_every_clickable_module_has_dimensions_field(self) -> None:
+        for module_id in CLICKABLE_MODULES:
+            self.assertRegex(
+                self.html,
+                rf'"{re.escape(module_id)}"\s*:\s*\{{.*?dimensions\s*:',
+                msg=f"{module_id} is missing dimensions",
+            )
+
+    def test_timeline_contains_only_the_two_real_corridors(self) -> None:
+        for incorrect in (
+            "4段加压走道",
+            "居住舱#1↔居住舱#2",
+            "居住舱#2↔实验舱",
+            "实验舱↔温室",
+            "温室↔居住舱#1",
+            "环形加压通路",
+            "8个对接面",
+            "4段加压走道48小时",
+        ):
+            self.assertNotIn(incorrect, self.ghc05)
+        self.assertIn("居住舱#1远端对接口", self.ghc05)
+        self.assertIn("电力模块北部", self.ghc05)
+        self.assertIn("温室远端对接口", self.ghc05)
+        self.assertIn("吴刚#2", self.ghc05)
+        self.assertIn("从温室模块远端接口断开", self.ghc05)
+
+
+if __name__ == "__main__":
+    unittest.main()