diff --git a/fe-admin/src/components/pe/PeDetailTabs.tsx b/fe-admin/src/components/pe/PeDetailTabs.tsx
index bae82d4..81ca743 100644
--- a/fe-admin/src/components/pe/PeDetailTabs.tsx
+++ b/fe-admin/src/components/pe/PeDetailTabs.tsx
@@ -391,6 +391,10 @@ function OpinionBox({
 // Layout 5A: header "Bước N — Phòng X" badge + grid-cols-2 cho N approvers
 // (wrap nếu N>2). Admin override badge khi SignedByUserId !== ApproverUserId.
 
+// Session 20 Chunk C: gộp opinions đồng cấp cùng Phòng → 1 box / Step.
+// Trước: 1 box / NV (mỗi Level × mỗi approver = 1 OpinionBox).
+// Bây giờ: 1 box / Step (Phòng), chỉ hiển thị các NV ĐÃ duyệt — opinion entries
+// sort theo Cấp tăng dần. NV chưa duyệt KHÔNG hiển thị (user yêu cầu Q3=a).
 function LevelOpinionsSectionV2({ ev }: { ev: PeDetailBundle }) {
   const flow = ev.approvalFlow
   const opinions = ev.levelOpinions
@@ -404,97 +408,90 @@ function LevelOpinionsSectionV2({ ev }: { ev: PeDetailBundle }) {
   }
 
   return (
-    <div className="space-y-4">
+    <div className="space-y-3">
       {flow.steps.map(step => {
         const totalApprovers = step.levels.reduce((n, l) => n + l.approvers.length, 0)
+        const stepOpinions = opinions
+          .filter(o => o.stepOrder === step.order)
+          .slice()
+          .sort((a, b) => a.levelOrder - b.levelOrder || a.signedAt.localeCompare(b.signedAt))
         return (
-          <div key={step.order} className="rounded-lg border border-slate-200 bg-slate-50/50 p-3">
-            <div className="mb-2.5 flex flex-wrap items-center gap-2">
-              <span className="text-[12px] font-bold uppercase tracking-wide text-slate-700">
-                Bước {step.order} — {step.name}
-              </span>
-              {step.departmentName && (
-                <span className="rounded bg-emerald-50 px-1.5 py-0.5 text-[10px] font-medium text-emerald-700">
-                  {step.departmentName}
-                </span>
-              )}
-              {totalApprovers > 1 && (
-                <span className="text-[10px] text-slate-400">
-                  ({totalApprovers} người duyệt)
-                </span>
-              )}
-            </div>
-            <div className="grid grid-cols-1 gap-3 md:grid-cols-2">
-              {step.levels.flatMap(level =>
-                level.approvers.map(approver => {
-                  const opinion = opinions.find(o =>
-                    o.stepOrder === step.order
-                    && o.levelOrder === level.order
-                    && o.approverUserId === approver.userId,
-                  ) ?? null
-                  return (
-                    <LevelOpinionBox
-                      key={`${step.order}-${level.order}-${approver.userId}`}
-                      levelOrder={level.order}
-                      approverUserId={approver.userId}
-                      approverName={approver.fullName}
-                      opinion={opinion}
-                    />
-                  )
-                }),
-              )}
-            </div>
-          </div>
+          <StepOpinionsBox
+            key={step.order}
+            stepOrder={step.order}
+            stepName={step.name}
+            departmentName={step.departmentName}
+            totalApprovers={totalApprovers}
+            opinions={stepOpinions}
+          />
         )
       })}
     </div>
   )
 }
 
-function LevelOpinionBox({
-  levelOrder,
-  approverUserId,
-  approverName,
-  opinion,
+function StepOpinionsBox({
+  stepOrder, stepName, departmentName, totalApprovers, opinions,
 }: {
-  levelOrder: number
-  approverUserId: string
-  approverName: string
-  opinion: PeLevelOpinion | null
+  stepOrder: number
+  stepName: string
+  departmentName?: string | null
+  totalApprovers: number
+  opinions: PeLevelOpinion[]
 }) {
-  const isSigned = !!opinion
-  const isAdminOverride = isSigned && opinion!.signedByUserId !== approverUserId
-
   return (
-    <div className={cn(
-      'rounded-lg border bg-white p-3',
-      isSigned ? 'border-emerald-200' : 'border-slate-200',
-    )}>
-      <div className="mb-2 flex items-start justify-between gap-2">
+    <div className="rounded-lg border border-slate-200 bg-white">
+      <div className="flex flex-wrap items-center gap-2 border-b border-slate-100 bg-slate-50/60 px-3 py-2">
+        <span className="text-[12px] font-bold uppercase tracking-wide text-slate-700">
+          Bước {stepOrder} — {stepName}
+        </span>
+        {departmentName && (
+          <span className="rounded bg-emerald-50 px-1.5 py-0.5 text-[10px] font-medium text-emerald-700">
+            {departmentName}
+          </span>
+        )}
+        <span className="ml-auto text-[10px] text-slate-500">
+          {opinions.length}/{totalApprovers} đã duyệt
+        </span>
+      </div>
+      <div className="p-3">
+        {opinions.length === 0 ? (
+          <div className="text-[12px] italic text-slate-400">— Chưa có ý kiến duyệt.</div>
+        ) : (
+          <div className="space-y-2">
+            {opinions.map(o => <StepOpinionEntry key={o.id} opinion={o} />)}
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
+
+function StepOpinionEntry({ opinion }: { opinion: PeLevelOpinion }) {
+  const isAdminOverride = opinion.signedByUserId !== opinion.approverUserId
+  return (
+    <div className="rounded border border-emerald-100 bg-emerald-50/40 p-2.5">
+      <div className="mb-1 flex items-start justify-between gap-2">
         <div className="min-w-0 flex-1">
-          <h4 className="text-[13px] font-semibold text-slate-700">
-            Cấp {levelOrder} — <span className="text-slate-900">{approverName}</span>
-          </h4>
+          <div className="text-[12px] font-semibold text-slate-900">
+            {opinion.approverFullName}
+            <span className="ml-2 rounded bg-slate-200 px-1 py-0.5 text-[10px] font-medium text-slate-700">
+              Cấp {opinion.levelOrder}
+            </span>
+          </div>
           {isAdminOverride && (
             <div className="mt-1 inline-flex items-center gap-1 rounded bg-amber-50 px-1.5 py-0.5 text-[10px] font-medium text-amber-700">
-              ⚠ Admin <strong>{opinion!.signedByFullName}</strong> duyệt thay
+              ⚠ Admin <strong>{opinion.signedByFullName}</strong> duyệt thay
             </div>
           )}
         </div>
-        {isSigned && (
-          <span className="inline-flex shrink-0 items-center gap-1 rounded-full bg-emerald-100 px-2 py-0.5 text-[10px] font-medium text-emerald-700">
-            <Check className="h-3 w-3" /> Đã duyệt
-          </span>
-        )}
+        <span className="inline-flex shrink-0 items-center gap-1 rounded-full bg-emerald-100 px-2 py-0.5 text-[10px] font-medium text-emerald-700">
+          <Check className="h-3 w-3" /> {new Date(opinion.signedAt).toLocaleString('vi-VN')}
+        </span>
       </div>
-      <div className="min-h-[40px] whitespace-pre-wrap text-sm text-slate-800">
-        {opinion?.comment ?? <span className="italic text-slate-400">— chưa duyệt</span>}
+      <div className="whitespace-pre-wrap text-[13px] text-slate-800">
+        {opinion.comment}
       </div>
-      {isSigned && (
-        <div className="mt-2 border-t border-slate-100 pt-1.5 text-[11px] text-slate-500">
-          {new Date(opinion!.signedAt).toLocaleString('vi-VN')}
-        </div>
-      )}
     </div>
   )
 }
diff --git a/fe-user/src/components/pe/PeDetailTabs.tsx b/fe-user/src/components/pe/PeDetailTabs.tsx
index bae82d4..81ca743 100644
--- a/fe-user/src/components/pe/PeDetailTabs.tsx
+++ b/fe-user/src/components/pe/PeDetailTabs.tsx
@@ -391,6 +391,10 @@ function OpinionBox({
 // Layout 5A: header "Bước N — Phòng X" badge + grid-cols-2 cho N approvers
 // (wrap nếu N>2). Admin override badge khi SignedByUserId !== ApproverUserId.
 
+// Session 20 Chunk C: gộp opinions đồng cấp cùng Phòng → 1 box / Step.
+// Trước: 1 box / NV (mỗi Level × mỗi approver = 1 OpinionBox).
+// Bây giờ: 1 box / Step (Phòng), chỉ hiển thị các NV ĐÃ duyệt — opinion entries
+// sort theo Cấp tăng dần. NV chưa duyệt KHÔNG hiển thị (user yêu cầu Q3=a).
 function LevelOpinionsSectionV2({ ev }: { ev: PeDetailBundle }) {
   const flow = ev.approvalFlow
   const opinions = ev.levelOpinions
@@ -404,97 +408,90 @@ function LevelOpinionsSectionV2({ ev }: { ev: PeDetailBundle }) {
   }
 
   return (
-    <div className="space-y-4">
+    <div className="space-y-3">
       {flow.steps.map(step => {
         const totalApprovers = step.levels.reduce((n, l) => n + l.approvers.length, 0)
+        const stepOpinions = opinions
+          .filter(o => o.stepOrder === step.order)
+          .slice()
+          .sort((a, b) => a.levelOrder - b.levelOrder || a.signedAt.localeCompare(b.signedAt))
         return (
-          <div key={step.order} className="rounded-lg border border-slate-200 bg-slate-50/50 p-3">
-            <div className="mb-2.5 flex flex-wrap items-center gap-2">
-              <span className="text-[12px] font-bold uppercase tracking-wide text-slate-700">
-                Bước {step.order} — {step.name}
-              </span>
-              {step.departmentName && (
-                <span className="rounded bg-emerald-50 px-1.5 py-0.5 text-[10px] font-medium text-emerald-700">
-                  {step.departmentName}
-                </span>
-              )}
-              {totalApprovers > 1 && (
-                <span className="text-[10px] text-slate-400">
-                  ({totalApprovers} người duyệt)
-                </span>
-              )}
-            </div>
-            <div className="grid grid-cols-1 gap-3 md:grid-cols-2">
-              {step.levels.flatMap(level =>
-                level.approvers.map(approver => {
-                  const opinion = opinions.find(o =>
-                    o.stepOrder === step.order
-                    && o.levelOrder === level.order
-                    && o.approverUserId === approver.userId,
-                  ) ?? null
-                  return (
-                    <LevelOpinionBox
-                      key={`${step.order}-${level.order}-${approver.userId}`}
-                      levelOrder={level.order}
-                      approverUserId={approver.userId}
-                      approverName={approver.fullName}
-                      opinion={opinion}
-                    />
-                  )
-                }),
-              )}
-            </div>
-          </div>
+          <StepOpinionsBox
+            key={step.order}
+            stepOrder={step.order}
+            stepName={step.name}
+            departmentName={step.departmentName}
+            totalApprovers={totalApprovers}
+            opinions={stepOpinions}
+          />
         )
       })}
     </div>
   )
 }
 
-function LevelOpinionBox({
-  levelOrder,
-  approverUserId,
-  approverName,
-  opinion,
+function StepOpinionsBox({
+  stepOrder, stepName, departmentName, totalApprovers, opinions,
 }: {
-  levelOrder: number
-  approverUserId: string
-  approverName: string
-  opinion: PeLevelOpinion | null
+  stepOrder: number
+  stepName: string
+  departmentName?: string | null
+  totalApprovers: number
+  opinions: PeLevelOpinion[]
 }) {
-  const isSigned = !!opinion
-  const isAdminOverride = isSigned && opinion!.signedByUserId !== approverUserId
-
   return (
-    <div className={cn(
-      'rounded-lg border bg-white p-3',
-      isSigned ? 'border-emerald-200' : 'border-slate-200',
-    )}>
-      <div className="mb-2 flex items-start justify-between gap-2">
+    <div className="rounded-lg border border-slate-200 bg-white">
+      <div className="flex flex-wrap items-center gap-2 border-b border-slate-100 bg-slate-50/60 px-3 py-2">
+        <span className="text-[12px] font-bold uppercase tracking-wide text-slate-700">
+          Bước {stepOrder} — {stepName}
+        </span>
+        {departmentName && (
+          <span className="rounded bg-emerald-50 px-1.5 py-0.5 text-[10px] font-medium text-emerald-700">
+            {departmentName}
+          </span>
+        )}
+        <span className="ml-auto text-[10px] text-slate-500">
+          {opinions.length}/{totalApprovers} đã duyệt
+        </span>
+      </div>
+      <div className="p-3">
+        {opinions.length === 0 ? (
+          <div className="text-[12px] italic text-slate-400">— Chưa có ý kiến duyệt.</div>
+        ) : (
+          <div className="space-y-2">
+            {opinions.map(o => <StepOpinionEntry key={o.id} opinion={o} />)}
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
+
+function StepOpinionEntry({ opinion }: { opinion: PeLevelOpinion }) {
+  const isAdminOverride = opinion.signedByUserId !== opinion.approverUserId
+  return (
+    <div className="rounded border border-emerald-100 bg-emerald-50/40 p-2.5">
+      <div className="mb-1 flex items-start justify-between gap-2">
         <div className="min-w-0 flex-1">
-          <h4 className="text-[13px] font-semibold text-slate-700">
-            Cấp {levelOrder} — <span className="text-slate-900">{approverName}</span>
-          </h4>
+          <div className="text-[12px] font-semibold text-slate-900">
+            {opinion.approverFullName}
+            <span className="ml-2 rounded bg-slate-200 px-1 py-0.5 text-[10px] font-medium text-slate-700">
+              Cấp {opinion.levelOrder}
+            </span>
+          </div>
           {isAdminOverride && (
             <div className="mt-1 inline-flex items-center gap-1 rounded bg-amber-50 px-1.5 py-0.5 text-[10px] font-medium text-amber-700">
-              ⚠ Admin <strong>{opinion!.signedByFullName}</strong> duyệt thay
+              ⚠ Admin <strong>{opinion.signedByFullName}</strong> duyệt thay
             </div>
           )}
         </div>
-        {isSigned && (
-          <span className="inline-flex shrink-0 items-center gap-1 rounded-full bg-emerald-100 px-2 py-0.5 text-[10px] font-medium text-emerald-700">
-            <Check className="h-3 w-3" /> Đã duyệt
-          </span>
-        )}
+        <span className="inline-flex shrink-0 items-center gap-1 rounded-full bg-emerald-100 px-2 py-0.5 text-[10px] font-medium text-emerald-700">
+          <Check className="h-3 w-3" /> {new Date(opinion.signedAt).toLocaleString('vi-VN')}
+        </span>
       </div>
-      <div className="min-h-[40px] whitespace-pre-wrap text-sm text-slate-800">
-        {opinion?.comment ?? <span className="italic text-slate-400">— chưa duyệt</span>}
+      <div className="whitespace-pre-wrap text-[13px] text-slate-800">
+        {opinion.comment}
       </div>
-      {isSigned && (
-        <div className="mt-2 border-t border-slate-100 pt-1.5 text-[11px] text-slate-500">
-          {new Date(opinion!.signedAt).toLocaleString('vi-VN')}
-        </div>
-      )}
     </div>
   )
 }