diff --git a/api/s24_coordinates.py b/api/s24_coordinates.py
index 1e6d5f2..d038a96 100644
--- a/api/s24_coordinates.py
+++ b/api/s24_coordinates.py
@@ -39,7 +39,7 @@ def get_nodes_in_extent(name: str, x1: float, y1: float, x2: float, y2: float) -
         x = coord['x']
         y = coord['y']
         if x1 <= x <= x2 and y1 <= y <= y2:
-            nodes.append(f"{node_id}:{x}:{y}")
+            nodes.append(f"{node_id}:junction:{x}:{y}")
     return nodes
 
 # DingZQ 2025-01-03, get links in extent