diff --git a/main.py b/main.py
index 6493342..c49442c 100644
--- a/main.py
+++ b/main.py
@@ -1404,7 +1404,7 @@ async def fastapi_get_network_coords(network: str) -> list[str] | None:
     return result
 
 # DingZQ, 2024-12-08, get all links' start and end node
-# link_id:node_id1:node_id2
+# link_id:link_type:node_id1:node_id2
 @app.get("/getnetworklinknodes/")
 async def fastapi_get_network_link_nodes(network: str) -> list[str] | None:
     return get_network_link_nodes(network)
diff --git a/tjnetwork.py b/tjnetwork.py
index de06930..5e1198c 100644
--- a/tjnetwork.py
+++ b/tjnetwork.py
@@ -842,13 +842,13 @@ def get_network_node_coords(name: str) -> dict[str, dict[str, float]]:
     return result
 
 # DingZQ, 2024-12-08, get all links' start and end node
-# link_id:node_id1:node_id2
+# link_id:link_type:node_id1:node_id2
 def get_network_link_nodes(name: str) -> list[str]:
-    links = api.get_links(name)
+    links_id_and_type = api.get_links_id_and_type(name)
     result = []
-    for link_id in links:
+    for link_id, link_type in links_id_and_type.items():
         nodes = api.get_link_nodes(name, link_id)
-        result.append(f"{link_id}:{nodes[0]}:{nodes[1]}")
+        result.append(f"{link_id}:{link_type}:{nodes[0]}:{nodes[1]}")
     return result
 
 ############################################################