diff --git a/src/Document/document.schema.ts b/src/Document/document.schema.ts
index f24e489..4e883a0 100644
--- a/src/Document/document.schema.ts
+++ b/src/Document/document.schema.ts
@@ -159,14 +159,16 @@ export class DocumentSchema extends PothosSchema {
           if (ctx.isSubscription) throw new Error('Not allowed')
           if (!ctx.http?.me?.id) throw new Error('User not found')
           if (!args.documentId) throw new Error('Document id not found')
-          if (!args.pageIndex) throw new Error('Page index not found')
+          if (args.pageIndex === undefined || args.pageIndex === null) throw new Error('Page index not found')
           const delta = await this.minio.getDocumentPage(args.documentId, args.pageIndex)
           if (!delta) throw new Error('Delta not found')
+          const totalPage = await this.minio.countDocumentPages(args.documentId)
           return {
             documentId: args.documentId,
             pageIndex: args.pageIndex,
             delta,
-            senderId: 'server',
+            totalPage,
+            senderId: ctx.http?.me?.id,
             eventType: DocumentEvent.CLIENT_REQUEST_SYNC,
           }
         },
@@ -265,8 +267,7 @@ export class DocumentSchema extends PothosSchema {
           const senderId = ctx.http?.me?.id
           if (!args.data.documentId) throw new Error('Document id not found')
           if (!senderId) throw new Error('User not found')
-          if (!args.data.pageIndex) throw new Error('Page index not found')
-
+          if (args.data.pageIndex === undefined || args.data.pageIndex === null) throw new Error('Page index not found')
           // save delta to minio
           const delta = args.data.delta
           if (!delta) throw new Error('Delta not found')
@@ -275,7 +276,7 @@ export class DocumentSchema extends PothosSchema {
           return {
             ...args.data,
             totalPage,
-            senderId,
+            senderId: 'server',
             eventType: DocumentEvent.SERVER_REQUEST_SYNC,
           }
         },
diff --git a/src/Minio/minio.service.ts b/src/Minio/minio.service.ts
index 19fab96..de9d80b 100644
--- a/src/Minio/minio.service.ts
+++ b/src/Minio/minio.service.ts
@@ -94,20 +94,27 @@ export class MinioService {
     )
   }
   async getDocumentPage(id: string, page: number) {
-    const delta = (await this.minioClient.getObject(
+    const delta = await this.minioClient.getObject(
       this.configService.get('BUCKET_NAME') ?? 'epess',
       `documents/${id}/${page}`,
-    )) as unknown as Delta
-    return delta
+    )
+    const buffer = await delta.read()
+    return JSON.parse(buffer.toString())
   }
   async countDocumentPages(id: string): Promise<number> {
     return new Promise<number>((resolve, reject) => {
-      const stream = this.minioClient.listObjects(this.configService.get('BUCKET_NAME') ?? 'epess', `documents/${id}`)
+      const stream = this.minioClient.listObjects(this.configService.get('BUCKET_NAME') ?? 'epess', `documents/${id}/`)
       const items: BucketItem[] = []
 
-      stream.on('data', (item) => items.push(item))
-      stream.on('end', () => resolve(items.length))
-      stream.on('error', (err) => reject(err))
+      stream.on('data', (item) => {
+        items.push(item)
+      })
+      stream.on('end', () => {
+        resolve(items.length)
+      })
+      stream.on('error', (err) => {
+        reject(err)
+      })
     })
   }
   // export document to docx format by get all pages and convert to docx