diff --git a/integration/service/oasis/stationgraph/doc.go b/integration/service/oasis/stationgraph/doc.go
index 5a161eec2e1..278f29588f0 100644
--- a/integration/service/oasis/stationgraph/doc.go
+++ b/integration/service/oasis/stationgraph/doc.go
@@ -26,6 +26,7 @@ Data structure
          * station 1, charge to 60% of maximum energy then left
          * station 1, charge to 80% of maximum energy then left
          * station 1, charge to 100% of maximum energy then left
+         * Logical node is identified by unique station ID + chargingStatus
     + connectivity: first built physical connectivity, then built logical
          * physical connectivity is ansowered by interface of connectivitymap.Querier, eg, station 1 connects station 4 and station 5
          * logical connectivity is build considering physical connection + final charging status
diff --git a/integration/service/oasis/stationgraph/station_graph.go b/integration/service/oasis/stationgraph/station_graph.go
index 0b87038d8b8..17f949b2d97 100644
--- a/integration/service/oasis/stationgraph/station_graph.go
+++ b/integration/service/oasis/stationgraph/station_graph.go
@@ -129,7 +129,7 @@ func accumulateDistanceAndDuration(g Graph, from nodeID, to nodeID, distance, du
 
 }
 
-// There will be multiple remaning range for destination node for multiple solutions
+// There will be different remaning range for destination node for multiple solutions
 // For example:
 // Solution 1: via station 111 -> station 222 -> Destination with remaning range 123
 // Solution 2: via station 333 -> Destination with remaning range 45