diff --git a/example/HelloMilvus.ts b/example/HelloMilvus.ts
index 8261aab3..aa239c30 100644
--- a/example/HelloMilvus.ts
+++ b/example/HelloMilvus.ts
@@ -3,7 +3,7 @@ import { DataType } from "@zilliz/milvus2-sdk-node/dist/milvus/types/Common";
 import { InsertReq } from "@zilliz/milvus2-sdk-node/dist/milvus/types/Data";
 
 const milvusClient = new MilvusClient("localhost:19530");
-const collectionManager = milvusClient.collectionManager;
+const collectionManager = MilvusClient.collectionManager;
 
 console.log("Milvus SDK Info: ", milvusClient.sdkInfo);
 
diff --git a/milvus/Client.ts b/milvus/Client.ts
index 8b0930aa..b8c6fc50 100644
--- a/milvus/Client.ts
+++ b/milvus/Client.ts
@@ -7,12 +7,17 @@ export class Client {
     this.client = client;
   }
 
+  /**
+   * @ignore
+   */
   checkCollectionName(data: any) {
     if (!data || !data.collection_name) {
       throw new Error(ERROR_REASONS.COLLECTION_NAME_IS_REQUIRED);
     }
   }
-
+  /**
+   * @ignore
+   */
   checkCollectionAndPartitionName(data: any) {
     if (!data || !data.collection_name || !data.partition_name) {
       throw new Error(ERROR_REASONS.COLLECTION_PARTITION_NAME_ARE_REQUIRED);
diff --git a/milvus/Data.ts b/milvus/Data.ts
index 00569653..6541957d 100644
--- a/milvus/Data.ts
+++ b/milvus/Data.ts
@@ -4,7 +4,7 @@ import { Client } from "./Client";
 import { Collection } from "./Collection";
 import { ERROR_REASONS } from "./const/ErrorReason";
 
-import { DataType, DataTypeMap, DslType, SegmentState } from "./types/Common";
+import { DataType, DataTypeMap, DslType } from "./types/Common";
 import {
   CalcDistanceReq,
   DeleteEntitiesReq,
diff --git a/milvus/index.ts b/milvus/index.ts
index e026d1a0..99c32f9d 100644
--- a/milvus/index.ts
+++ b/milvus/index.ts
@@ -50,7 +50,7 @@ export class MilvusClient {
     this.dataManager = new Data(this.client, this.collectionManager);
   }
 
-  get sdkInfo() {
+  static get sdkInfo() {
     return {
       version: sdkInfo.version,
       recommandMilvus: sdkInfo.milvusVersion,
@@ -69,10 +69,10 @@ export class MilvusClient {
     // Each node contains the same system info, so get version from first one.
     const curMilvusVersion =
       res.response.nodes_info[0]?.infos?.system_info?.build_version;
-    if (curMilvusVersion !== this.sdkInfo.recommandMilvus) {
+    if (curMilvusVersion !== MilvusClient.sdkInfo.recommandMilvus) {
       console.warn("------- Warning ---------");
       console.warn(
-        `Node sdk ${this.sdkInfo.version} recommend Milvus Version ${this.sdkInfo.recommandMilvus}.\nDifferent version may cause some error.`
+        `Node sdk ${MilvusClient.sdkInfo.version} recommend Milvus Version ${MilvusClient.sdkInfo.recommandMilvus}.\nDifferent version may cause some error.`
       );
       return { error_code: ErrorCode.SUCCESS, match: false };
     }
diff --git a/test/Index.spec.ts b/test/Index.spec.ts
index aa9f19a1..f65f06f9 100644
--- a/test/Index.spec.ts
+++ b/test/Index.spec.ts
@@ -1,7 +1,6 @@
 import { MilvusClient } from "../milvus";
 
 import { GENERATE_NAME, IP } from "../const";
-import { DataType } from "../milvus/types/Common";
 import { ErrorCode } from "../milvus/types/Response";
 import { genCollectionParams, VECTOR_FIELD_NAME } from "../utils/test";
 import { ERROR_REASONS } from "../milvus/const/ErrorReason";
diff --git a/test/MilvusClient.spec.ts b/test/MilvusClient.spec.ts
index 7a42f43a..4bae450b 100644
--- a/test/MilvusClient.spec.ts
+++ b/test/MilvusClient.spec.ts
@@ -16,8 +16,8 @@ describe("Milvus client ", () => {
   });
 
   it("Expect get node sdk info", async () => {
-    expect(milvusClient.sdkInfo.version).toEqual(sdkInfo.version);
-    expect(milvusClient.sdkInfo.recommandMilvus).toEqual(sdkInfo.milvusVersion);
+    expect(MilvusClient.sdkInfo.version).toEqual(sdkInfo.version);
+    expect(MilvusClient.sdkInfo.recommandMilvus).toEqual(sdkInfo.milvusVersion);
   });
 
   it("Check version should success", async () => {