diff --git a/web/app/components/datasets/settings/form/index.tsx b/web/app/components/datasets/settings/form/index.tsx
index afc78b7844..102a7da012 100644
--- a/web/app/components/datasets/settings/form/index.tsx
+++ b/web/app/components/datasets/settings/form/index.tsx
@@ -357,7 +357,9 @@ const Form = () => {
         </div>
       )}
       {
-        indexMethod === IndexingType.QUALIFIED && (
+        indexMethod === IndexingType.QUALIFIED
+        && [ChunkingMode.text, ChunkingMode.parentChild].includes(currentDataset?.doc_form as ChunkingMode)
+        && (
           <>
             <Divider
               type="horizontal"
diff --git a/web/app/components/rag-pipeline/components/chunk-card-list/chunk-card.tsx b/web/app/components/rag-pipeline/components/chunk-card-list/chunk-card.tsx
index 106084846c..756417d163 100644
--- a/web/app/components/rag-pipeline/components/chunk-card-list/chunk-card.tsx
+++ b/web/app/components/rag-pipeline/components/chunk-card-list/chunk-card.tsx
@@ -63,7 +63,7 @@ const ChunkCard = (props: ChunkCardProps) => {
 
   const summaryElement = useMemo(() => {
     if (chunkType === ChunkingMode.parentChild) {
-      return (content as ParentChildChunk).parent_content.summary
+      return (content as ParentChildChunk).parent_summary
     }
     if (chunkType === ChunkingMode.text) {
       return (content as GeneralChunk).summary
diff --git a/web/app/components/rag-pipeline/components/chunk-card-list/index.spec.tsx b/web/app/components/rag-pipeline/components/chunk-card-list/index.spec.tsx
index 8a15193d2e..470942eeb3 100644
--- a/web/app/components/rag-pipeline/components/chunk-card-list/index.spec.tsx
+++ b/web/app/components/rag-pipeline/components/chunk-card-list/index.spec.tsx
@@ -22,7 +22,7 @@ const createGeneralChunks = (overrides: GeneralChunks = []): GeneralChunks => {
 
 const createParentChildChunk = (overrides: Partial<ParentChildChunk> = {}): ParentChildChunk => ({
   child_contents: ['Child content 1', 'Child content 2'],
-  parent_content: { content: 'This is the parent content that contains the children.' },
+  parent_content: 'This is the parent content that contains the children.',
   parent_mode: 'paragraph',
   ...overrides,
 })
@@ -32,7 +32,7 @@ const createParentChildChunks = (overrides: Partial<ParentChildChunks> = {}): Pa
     createParentChildChunk(),
     createParentChildChunk({
       child_contents: ['Another child 1', 'Another child 2', 'Another child 3'],
-      parent_content: { content: 'Another parent content here.' },
+      parent_content: 'Another parent content here.',
     }),
   ],
   parent_mode: 'paragraph',
@@ -706,7 +706,7 @@ describe('ChunkCardList', () => {
       const chunks = createParentChildChunks({
         parent_child_chunks: [
           createParentChildChunk({
-            parent_content: { content: 'Parent' }, // 6 characters
+            parent_content: 'Parent', // 6 characters
             child_contents: ['Child'],
           }),
         ],
@@ -1047,7 +1047,7 @@ describe('ChunkCardList Integration', () => {
       const parentChildChunks = createParentChildChunks({
         parent_child_chunks: [
           {
-            parent_content: { content: 'Main section about React components and their lifecycle.' },
+            parent_content: 'Main section about React components and their lifecycle.',
             child_contents: [
               'React components are building blocks.',
               'Lifecycle methods control component behavior.',
diff --git a/web/app/components/rag-pipeline/components/chunk-card-list/index.tsx b/web/app/components/rag-pipeline/components/chunk-card-list/index.tsx
index 6bd69bc46e..176298b2e8 100644
--- a/web/app/components/rag-pipeline/components/chunk-card-list/index.tsx
+++ b/web/app/components/rag-pipeline/components/chunk-card-list/index.tsx
@@ -25,7 +25,7 @@ export const ChunkCardList = (props: ChunkCardListProps) => {
 
   const getWordCount = (seg: GeneralChunk | ParentChildChunk | QAChunk) => {
     if (chunkType === ChunkingMode.parentChild)
-      return (seg as ParentChildChunk).parent_content.content?.length
+      return (seg as ParentChildChunk).parent_content?.length
     if (chunkType === ChunkingMode.text)
       return (seg as GeneralChunk).content.length
     return (seg as QAChunk).question.length + (seg as QAChunk).answer.length
diff --git a/web/app/components/rag-pipeline/components/chunk-card-list/types.ts b/web/app/components/rag-pipeline/components/chunk-card-list/types.ts
index 331f17d17c..6117855b3b 100644
--- a/web/app/components/rag-pipeline/components/chunk-card-list/types.ts
+++ b/web/app/components/rag-pipeline/components/chunk-card-list/types.ts
@@ -5,7 +5,8 @@ export type GeneralChunk = {
 export type GeneralChunks = GeneralChunk[]
 export type ParentChildChunk = {
   child_contents: string[]
-  parent_content: GeneralChunk
+  parent_content: string
+  parent_summary?: string
   parent_mode: string
 }
 
diff --git a/web/app/components/rag-pipeline/components/panel/test-run/result/result-preview/utils.ts b/web/app/components/rag-pipeline/components/panel/test-run/result/result-preview/utils.ts
index 0e62941053..de3666224f 100644
--- a/web/app/components/rag-pipeline/components/panel/test-run/result/result-preview/utils.ts
+++ b/web/app/components/rag-pipeline/components/panel/test-run/result/result-preview/utils.ts
@@ -1,4 +1,4 @@
-import type { ChunkInfo, GeneralChunk, GeneralChunks, ParentChildChunks, QAChunks } from '../../../../chunk-card-list/types'
+import type { ChunkInfo, GeneralChunks, ParentChildChunks, QAChunks } from '../../../../chunk-card-list/types'
 import type { ParentMode } from '@/models/datasets'
 import { RAG_PIPELINE_PREVIEW_CHUNK_NUM } from '@/config'
 import { ChunkingMode } from '@/models/datasets'
@@ -22,8 +22,9 @@ const formatGeneralChunks = (outputs: any) => {
 }
 
 type ParentChildChunkPreview = {
-  content: GeneralChunk
+  content: string
   child_chunks: string[]
+  summary?: string
 }
 
 const formatParentChildChunks = (outputs: any, parentMode: ParentMode) => {
@@ -36,6 +37,7 @@ const formatParentChildChunks = (outputs: any, parentMode: ParentMode) => {
     chunks.slice(0, RAG_PIPELINE_PREVIEW_CHUNK_NUM).forEach((chunk) => {
       chunkInfo.parent_child_chunks?.push({
         parent_content: chunk.content,
+        parent_summary: chunk.summary,
         child_contents: chunk.child_chunks,
         parent_mode: parentMode,
       })
diff --git a/web/app/components/workflow/nodes/knowledge-base/panel.tsx b/web/app/components/workflow/nodes/knowledge-base/panel.tsx
index e6d4752714..6e0f038b70 100644
--- a/web/app/components/workflow/nodes/knowledge-base/panel.tsx
+++ b/web/app/components/workflow/nodes/knowledge-base/panel.tsx
@@ -170,7 +170,9 @@ const Panel: FC<NodePanelProps<KnowledgeBaseNodeType>> = ({
                   <Split className="h-[1px]" />
                 </div>
                 {
-                  data.indexing_technique === IndexMethodEnum.QUALIFIED && (
+                  data.indexing_technique === IndexMethodEnum.QUALIFIED
+                  && [ChunkStructureEnum.general, ChunkStructureEnum.parent_child].includes(data.chunk_structure)
+                  && (
                     <>
                       <SummaryIndexSetting
                         summaryIndexSetting={data.summary_index_setting}