diff --git a/src/Backend/SolutionErp.Infrastructure/Services/PurchaseEvaluationWorkflowService.cs b/src/Backend/SolutionErp.Infrastructure/Services/PurchaseEvaluationWorkflowService.cs
index a8aebc0..96236ba 100644
--- a/src/Backend/SolutionErp.Infrastructure/Services/PurchaseEvaluationWorkflowService.cs
+++ b/src/Backend/SolutionErp.Infrastructure/Services/PurchaseEvaluationWorkflowService.cs
@@ -1055,6 +1055,54 @@ public class PurchaseEvaluationWorkflowService(
                 refId: evaluation.Id,
                 ct: ct);
         }
+
+        // ===== Notify approver(s) cấp hiện tại khi phiếu vào ChoDuyet =====
+        // Tra Sol (Zalo): approver KHÔNG nhận chuông "có hồ sơ cần duyệt" — chỉ
+        // drafter được báo (block ↑). Bổ sung: mỗi lần phiếu ENTER hoặc ADVANCE
+        // tới 1 Cấp duyệt (toPhase==ChoDuyet) → báo NV Cấp đang chờ.
+        // Resolve mirror ĐÚNG canonical (ApplyDrafterBypassOnSubmit / EnsureActor
+        // line ~301): load ApprovalWorkflow → Step tại CurrentWorkflowStepIndex →
+        // Levels.Where(Order == CurrentApprovalLevelOrder) → distinct ApproverUserId.
+        // V2-only (ApprovalWorkflowId + pointer set); phiếu V1/no-workflow skip.
+        // Best-effort (try/catch) — phiếu đã SaveChanges, notify fail KHÔNG fail transition.
+        if (toPhase == PurchaseEvaluationPhase.ChoDuyet
+            && evaluation.ApprovalWorkflowId is Guid notifyAwId
+            && evaluation.CurrentWorkflowStepIndex is int notifyCsi
+            && evaluation.CurrentApprovalLevelOrder is int notifyLvl)
+        {
+            try
+            {
+                var workflow = await db.ApprovalWorkflows.AsNoTracking()
+                    .Include(w => w.Steps).ThenInclude(s => s.Levels)
+                    .FirstOrDefaultAsync(w => w.Id == notifyAwId, ct);
+                var stepsOrdered = workflow?.Steps.OrderBy(s => s.Order).ToList();
+                if (stepsOrdered is not null && notifyCsi >= 0 && notifyCsi < stepsOrdered.Count)
+                {
+                    var approverIds = stepsOrdered[notifyCsi].Levels
+                        .Where(l => l.Order == notifyLvl
+                            && l.ApproverUserId != Guid.Empty
+                            && l.ApproverUserId != actorUserId)
+                        .Select(l => l.ApproverUserId)
+                        .Distinct()
+                        .ToList();
+                    if (approverIds.Count > 0)
+                    {
+                        await notifications.NotifyManyAsync(
+                            approverIds,
+                            NotificationType.Generic,
+                            $"Phiếu cần bạn duyệt: {evaluation.MaPhieu ?? evaluation.TenGoiThau}",
+                            "Có phiếu Duyệt NCC đang chờ bạn duyệt.",
+                            $"/purchase-evaluations/{evaluation.Id}",
+                            evaluation.Id,
+                            ct);
+                    }
+                }
+            }
+            catch
+            {
+                // best-effort — nuốt lỗi notify để KHÔNG rollback transition đã lưu.
+            }
+        }
     }
 
     // Mig 26 (Session 19) — helper resolve FullName cho denorm `SignedByFullName`.