diff --git a/src/App.tsx b/src/App.tsx
index 78bcd0a..97921bd 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -508,7 +508,7 @@ export default function App() {
   const [customerProvinceData, setCustomerProvinceData] = useState<{ name: string; value: number }[]>([]);
   useEffect(() => {
     if (customerChartView === 'province') {
-      fetchRegionChart('province', 5).then(setCustomerProvinceData).catch(() => setCustomerProvinceData([]));
+      fetchRegionChart('province', 5, 'vehicle').then(setCustomerProvinceData).catch(() => setCustomerProvinceData([]));
     }
   }, [customerChartView]);
 
@@ -1456,6 +1456,8 @@ export default function App() {
                 </button>
               </div>
 
+              <span className="text-[10px] text-red-500 font-medium">*说明：当天里程&gt;0即为出勤。</span>
+
               <div className="flex-1 max-w-[240px]">
                 {deptViewMode === 'manager' && (
                   <div className="relative">
diff --git a/src/api.ts b/src/api.ts
index 52a1fda..be568e8 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -83,8 +83,8 @@ export async function fetchInventoryStats(): Promise<RegionalInventoryStats[]> {
   return fetchJson<RegionalInventoryStats[]>(`${BASE}/inventory-stats`);
 }
 
-export async function fetchRegionChart(groupBy: string, top = 8): Promise<{ name: string; value: number }[]> {
-  return fetchJson<{ name: string; value: number }[]>(`${BASE}/region-chart?groupBy=${groupBy}&top=${top}`);
+export async function fetchRegionChart(groupBy: string, top = 8, source = 'realtime'): Promise<{ name: string; value: number }[]> {
+  return fetchJson<{ name: string; value: number }[]>(`${BASE}/region-chart?groupBy=${groupBy}&top=${top}&source=${source}`);
 }
 
 export async function fetchWeeklyDetail(type: string): Promise<WeeklyDetailItem[]> {
diff --git a/src/server/routes/vehicles.ts b/src/server/routes/vehicles.ts
index e1eb6fe..a823db7 100644
--- a/src/server/routes/vehicles.ts
+++ b/src/server/routes/vehicles.ts
@@ -1035,22 +1035,31 @@ app.get('/region-chart', async (c) => {
   const vehicles = await getVehicles();
   const operating = vehicles.filter((v) => v.status === 'Operating');
   const groupBy = c.req.query('groupBy') || 'region'; // 'region' | 'province'
+  const source = c.req.query('source') || 'realtime'; // 'realtime' | 'vehicle'
   const top = Number(c.req.query('top')) || 8;
 
   let counts: Map<string, number>;
   if (groupBy === 'province') {
-    // Get realtime province data
-    const [rows] = await pool.query<any[]>(`SELECT plate_number, province FROM tab_truck_remote_sync_realtime_info WHERE is_deleted = 0 AND plate_number IS NOT NULL`);
-    const plateProvince = new Map<string, string>();
-    for (const row of rows as any[]) {
-      const plate = (row.plate_number || '').trim();
-      const prov = (row.province || '').replace(/省|市$/, '').trim();
-      if (plate && prov) plateProvince.set(plate, prov);
-    }
     counts = new Map<string, number>();
-    for (const v of operating) {
-      const prov = plateProvince.get(v.plateNumber) || '未知';
-      counts.set(prov, (counts.get(prov) || 0) + 1);
+    if (source === 'vehicle') {
+      // Use vehicle table's own province field
+      for (const v of operating) {
+        const prov = (v.province || '').replace(/省|市$/, '').trim() || '未知';
+        counts.set(prov, (counts.get(prov) || 0) + 1);
+      }
+    } else {
+      // Use realtime table province
+      const [rows] = await pool.query<any[]>(`SELECT plate_number, province FROM tab_truck_remote_sync_realtime_info WHERE is_deleted = 0 AND plate_number IS NOT NULL`);
+      const plateProvince = new Map<string, string>();
+      for (const row of rows as any[]) {
+        const plate = (row.plate_number || '').trim();
+        const prov = (row.province || '').replace(/省|市$/, '').trim();
+        if (plate && prov) plateProvince.set(plate, prov);
+      }
+      for (const v of operating) {
+        const prov = plateProvince.get(v.plateNumber) || '未知';
+        counts.set(prov, (counts.get(prov) || 0) + 1);
+      }
     }
   } else {
     counts = new Map<string, number>();