diff --git a/tests/test_topology_api.py b/tests/test_topology_api.py
index 628eeb0..56807f0 100644
--- a/tests/test_topology_api.py
+++ b/tests/test_topology_api.py
@@ -200,6 +200,31 @@ class TopologyApiQueryTests(unittest.TestCase):
             datetime.fromisoformat("2024-06-16T07:23:00+00:00"),
         )
 
+    def test_known_vehicle_dimensions_are_recorded(self) -> None:
+        response = self.client.get(
+            "/api/v1/bases/guanghan/snapshot?mission=GHC-05"
+        )
+        components = {
+            component["key"]: component
+            for component in response.get_json()["components"]
+        }
+        self.assertEqual(
+            components["binglun_1"]["dimensions"],
+            {"heightM": 30.2, "massT": 25.0},
+        )
+        self.assertEqual(
+            components["binglun_2"]["dimensions"],
+            {"heightM": 30.2, "massT": 25.0},
+        )
+        self.assertEqual(
+            components["binglun_3"]["dimensions"],
+            {"heightM": 36.7, "massT": 28.194},
+        )
+        self.assertEqual(
+            components["wugang_2"]["dimensions"],
+            {"diameterM": 11.2, "massT": 9.64},
+        )
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/topology_api/seed/seed_ghc01_to_ghc05.py b/topology_api/seed/seed_ghc01_to_ghc05.py
index cea2558..c7676ab 100644
--- a/topology_api/seed/seed_ghc01_to_ghc05.py
+++ b/topology_api/seed/seed_ghc01_to_ghc05.py
@@ -341,9 +341,11 @@ def seed():
             mass_t=28.2, detail_url="/home/mission/Guanghan_Program/GHC-01")
         add_version("binglun_1", "BL-01_0", "冰轮一号",
             summary="首艘冰轮着陆器，Block 1，GHC-04后ISRU已关闭，转为专职燃料运输",
+            height_m=30.2, mass_t=25.0,
             detail_url="/home/Spacecraft/Binglun_Lander")
         add_version("binglun_2", "BL-02_0", "冰轮二号",
             summary="第二艘冰轮着陆器，Block 1，专职燃料运输",
+            height_m=30.2, mass_t=25.0,
             detail_url="/home/Spacecraft/Binglun_Lander")
         add_version("power_module_hub", "GHC-03_0", "电力模块安装节点",
             summary="十字型四向安装节点，电力模块中枢",
@@ -360,6 +362,7 @@ def seed():
             summary="矿石原料和成品氢氧燃料的存储设施")
         add_version("binglun_3", "BL-03_0", "冰轮三号",
             summary="首艘Block 2冰轮着陆器，加宽燃料罐，接口与Block 1完全兼容",
+            height_m=36.7, mass_t=28.194,
             detail_url="/home/Spacecraft/Binglun_Lander")
         add_version("fuel_storage_mod", "GHC-04_0", "核燃料存储模块",
             summary="核反应堆燃料组件存储及废料暂存")
@@ -393,8 +396,10 @@ def seed():
                        "transportWidthM": 5.0})
         add_version("wugang_2", "GHC-05_0", "吴刚二号",
             summary="首艘Block 2吴刚月面着陆器，GHC-05乘组搭乘抵达，高度雷达故障后手动着陆",
+            diameter_m=11.2, mass_t=9.64,
             detail_url="/home/Spacecraft/Wugang_Lunar_Lander",
-            properties={"block": 2, "landingMode": "manual"})
+            properties={"block": 2, "landingMode": "manual",
+                        "fuelTankDiameterM": 4.25})
 
         print("Versions created")