diff --git a/src/HikvisionAttendanceManager.App/Services/HrmsEmployeeService.cs b/src/HikvisionAttendanceManager.App/Services/HrmsEmployeeService.cs
index 9ceb7a4..9643788 100644
--- a/src/HikvisionAttendanceManager.App/Services/HrmsEmployeeService.cs
+++ b/src/HikvisionAttendanceManager.App/Services/HrmsEmployeeService.cs
@@ -20,15 +20,38 @@ public sealed class HrmsEmployeeService
 
     public async Task<IReadOnlyList<LocationSite>> GetLocationSitesAsync(CancellationToken cancellationToken)
     {
-        const string sql = """
+        const string inventoryTitleSql = """
             SELECT DISTINCT e.location_site_id,
                    COALESCE(ls.title, CONCAT('Site ', e.location_site_id)) AS site_title
             FROM hrms.employee e
             LEFT JOIN inventory.location_site ls ON ls.id = e.location_site_id
-            WHERE e.location_site_id IS NOT NULL
+            WHERE e.location_site_id IS NOT NULL AND e.location_site_id > 0
             ORDER BY site_title
             """;
-        return await QuerySitesAsync(sql, null, cancellationToken);
+        try
+        {
+            var sites = await QuerySitesAsync(inventoryTitleSql, null, cancellationToken);
+            if (sites.Count > 0)
+            {
+                AppLogger.Info($"[HRMS] Loaded {sites.Count} location site(s) via inventory.location_site.");
+                return sites;
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warning("Location site load via inventory.location_site failed; falling back to employee-derived sites. " + ex.Message);
+        }
+
+        const string employeeFallbackSql = """
+            SELECT DISTINCT e.location_site_id,
+                   CONCAT('Site ', e.location_site_id) AS site_title
+            FROM hrms.employee e
+            WHERE e.location_site_id IS NOT NULL AND e.location_site_id > 0
+            ORDER BY e.location_site_id
+            """;
+        var fallbackSites = await QuerySitesAsync(employeeFallbackSql, null, cancellationToken);
+        AppLogger.Info($"[HRMS] Loaded {fallbackSites.Count} location site(s) from hrms.employee fallback.");
+        return fallbackSites;
     }
 
     public async Task<IReadOnlyList<HrmsDepartment>> GetActiveDepartmentsBySiteAsync(long siteId, CancellationToken cancellationToken)