diff --git a/zbook_backend/gapi/admin_get_daily_visitors.go b/zbook_backend/gapi/admin_get_daily_visitors.go
index 52f1f41..f34e802 100644
--- a/zbook_backend/gapi/admin_get_daily_visitors.go
+++ b/zbook_backend/gapi/admin_get_daily_visitors.go
@@ -2,6 +2,9 @@ package gapi
 
 import (
 	"context"
+
+	"math/rand"
+
 	"net/netip"
 	"sort"
 
@@ -71,13 +74,17 @@ func ConvertVisitor(server *Server, visitors map[string]int, lang string) []*rpc
 					city = record.CityNameEn.String
 				}
 			}
+			// 在这里添加随机扰动
+			latWithNoise := record.Latitude.Float64 + (rand.Float64()*2 - 1)
+			longWithNoise := record.Longitude.Float64 + (rand.Float64()*2 - 1)
+
 			ret_reports = append(ret_reports,
 				&rpcs.Visitor{
 					Ip:    ipStr,
 					City:  city,
 					Count: int32(count),
-					Lat:   record.Latitude.Float64,
-					Long:  record.Longitude.Float64,
+					Lat:   latWithNoise,
+					Long:  longWithNoise,
 				},
 			)
 		}
diff --git a/zbook_frontend/src/components/charts/EarthChart.tsx b/zbook_frontend/src/components/charts/EarthChart.tsx
index e18e17f..b3d6c9d 100644
--- a/zbook_frontend/src/components/charts/EarthChart.tsx
+++ b/zbook_frontend/src/components/charts/EarthChart.tsx
@@ -27,8 +27,8 @@ export default function EarthChart({
 }) {
   markers = markers || [];
   markers = [
-    { ip: "66.249.66.165", lat: 37.751, long: -97.822, count: 13 },
-    { ip: "66.249.66.165", lat: 37.751, long: -97.822, count: 13 },
+    { ip: "66.249.66.165", lat: 37.751, long: -98.822, count: 13 },
+    { ip: "66.249.66.165", lat: 38.751, long: -97.822, count: 13 },
   ];
   const svgRef = useRef<SVGSVGElement>(null);
   console.log("markers:", markers);
@@ -174,7 +174,6 @@ export default function EarthChart({
       });
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
-
   return (
     <svg
       ref={svgRef}