diff --git a/package-lock.json b/package-lock.json
index 1652476..3d465ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ln-bi",
-  "version": "1.1.23",
+  "version": "1.1.24",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ln-bi",
-      "version": "1.1.23",
+      "version": "1.1.24",
       "dependencies": {
         "@amap/amap-jsapi-loader": "^1.0.1",
         "@hono/node-server": "^1.13.0",
diff --git a/package.json b/package.json
index 269359b..db540c6 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "ln-bi",
   "private": true,
-  "version": "1.1.23",
+  "version": "1.1.24",
   "type": "module",
   "scripts": {
     "dev": "concurrently -n server,client -c blue,green \"npm run dev:server\" \"npm run dev:client\"",
diff --git a/src/server/routes/mileage/query-cache.ts b/src/server/routes/mileage/query-cache.ts
index f963ae8..980dd97 100644
--- a/src/server/routes/mileage/query-cache.ts
+++ b/src/server/routes/mileage/query-cache.ts
@@ -21,12 +21,24 @@ async function loadSource(start: string, end: string, protocols: OneOsProtocol[]
     plates ? Promise.resolve([]) : fetchOneOsDailyMileage(previousMileageDate(start), undefined, protocols, refresh),
   ]);
   // Plate-scoped summary requests are used only for filtered trends.
-  if (plates || start === end) return { summary, yesterdayRows };
-  const missing = summary.vehicles.filter(v => v.endDateTotalMileageKm === null && v.validDays + v.anomalyDays > 0);
+  if (plates) return { summary, yesterdayRows };
+  const missing = summary.vehicles.filter(v => v.endDateTotalMileageKm === null);
   if (!missing.length) return { summary, yesterdayRows };
-  const dates = mileageDatesBetween(start, previousMileageDate(end));
-  const history = await fetchOneOsMileageDates(dates, missing.map(v => v.plateNumber), protocols);
   const priorOdometers = new Map<string, { date: string; km: number }>();
+  const endRows = await fetchOneOsDailyMileage(end, missing.map(v => v.plateNumber), protocols, refresh);
+  const observationDate = new Intl.DateTimeFormat('en-CA', { timeZone: 'Asia/Shanghai' });
+  for (const row of endRows) {
+    if (row.status !== 'NORMAL' || row.dataQuality !== 'CARRIED_FORWARD' || row.totalMileageKm == null || !row.dataTime) continue;
+    // OneOS observation timestamps include the Shanghai offset, even for older carried readings.
+    const time = Date.parse(row.dataTime);
+    if (!Number.isFinite(time)) continue;
+    const date = observationDate.format(time);
+    if (date <= end) priorOdometers.set(row.plateNumber.toUpperCase(), { date, km: row.totalMileageKm });
+  }
+  const unresolved = missing.filter(v => !priorOdometers.has(v.plateNumber) && v.validDays + v.anomalyDays > 0);
+  if (start === end || !unresolved.length) return { summary, yesterdayRows, priorOdometers };
+  const dates = mileageDatesBetween(start, previousMileageDate(end));
+  const history = await fetchOneOsMileageDates(dates, unresolved.map(v => v.plateNumber), protocols);
   for (const date of dates.reverse()) {
     for (const row of history.get(date) || []) {
       const plate = row.plateNumber.toUpperCase();