diff --git a/src/types/websockets/ws-api.ts b/src/types/websockets/ws-api.ts
index ffbfed9..f6de45f 100644
--- a/src/types/websockets/ws-api.ts
+++ b/src/types/websockets/ws-api.ts
@@ -65,6 +65,7 @@ export interface WSAPIRequest<
 export interface WSAPIResponse<
   TResponseData extends object = object,
   TOperation extends WSAPIOperation = WSAPIOperation,
+  TResponseExtInfo = {}, // added as optional for batch calls
 > {
   wsKey: WsKey;
   /** Auto-generated */
@@ -73,6 +74,7 @@ export interface WSAPIResponse<
   retMsg: 'OK' | string;
   op: TOperation;
   data: TResponseData;
+  retExtInfo: TResponseExtInfo;
   header?: {
     'X-Bapi-Limit': string;
     'X-Bapi-Limit-Status': string;
diff --git a/src/websocket-api-client.ts b/src/websocket-api-client.ts
index 4e97ab0..d08037a 100644
--- a/src/websocket-api-client.ts
+++ b/src/websocket-api-client.ts
@@ -1,4 +1,16 @@
-import { OrderParamsV5, OrderResultV5 } from './types';
+import {
+  AmendOrderParamsV5,
+  BatchAmendOrderParamsV5,
+  BatchAmendOrderResultV5,
+  BatchCancelOrderParamsV5,
+  BatchCancelOrderResultV5,
+  BatchCreateOrderResultV5,
+  BatchOrderParamsV5,
+  BatchOrdersRetExtInfoV5,
+  CancelOrderParamsV5,
+  OrderParamsV5,
+  OrderResultV5,
+} from './types';
 import { WSAPIResponse } from './types/websockets/ws-api';
 import { WSClientConfigurableOptions } from './types/websockets/ws-general';
 import { DefaultLogger } from './util';
@@ -90,6 +102,122 @@ export class WebsocketAPIClient {
     );
   }
 
+  /**
+   * Amend an order
+   *
+   * @param params
+   * @returns
+   */
+  amendOrder(
+    params: AmendOrderParamsV5,
+  ): Promise<WSAPIResponse<OrderResultV5, 'order.amend'>> {
+    return this.wsClient.sendWSAPIRequest(
+      WS_KEY_MAP.v5PrivateTrade,
+      'order.amend',
+      params,
+    );
+  }
+
+  /**
+   * Cancel an order
+   *
+   * @param params
+   * @returns
+   */
+  cancelOrder(
+    params: CancelOrderParamsV5,
+  ): Promise<WSAPIResponse<OrderResultV5, 'order.cancel'>> {
+    return this.wsClient.sendWSAPIRequest(
+      WS_KEY_MAP.v5PrivateTrade,
+      'order.cancel',
+      params,
+    );
+  }
+
+  /**
+   * Batch submit orders
+   *
+   * @param params
+   * @returns
+   */
+  batchSubmitOrders(
+    category: 'option' | 'linear',
+    orders: BatchOrderParamsV5[],
+  ): Promise<
+    WSAPIResponse<
+      {
+        list: BatchCreateOrderResultV5[];
+      },
+      'order.create-batch',
+      BatchOrdersRetExtInfoV5
+    >
+  > {
+    return this.wsClient.sendWSAPIRequest(
+      WS_KEY_MAP.v5PrivateTrade,
+      'order.create-batch',
+      {
+        category,
+        request: orders,
+      },
+    );
+  }
+
+  /**
+   * Batch amend orders
+   *
+   * @param params
+   * @returns
+   */
+  batchAmendOrder(
+    category: 'option' | 'linear',
+    orders: BatchAmendOrderParamsV5[],
+  ): Promise<
+    WSAPIResponse<
+      {
+        list: BatchAmendOrderResultV5[];
+      },
+      'order.amend-batch',
+      BatchOrdersRetExtInfoV5
+    >
+  > {
+    return this.wsClient.sendWSAPIRequest(
+      WS_KEY_MAP.v5PrivateTrade,
+      'order.amend-batch',
+      {
+        category,
+        request: orders,
+      },
+    );
+  }
+
+  /**
+   * Batch cancel orders
+   *
+   * @param params
+   * @returns
+   */
+  batchCancelOrder(
+    category: 'option' | 'linear',
+    orders: BatchCancelOrderParamsV5[],
+  ): Promise<
+    WSAPIResponse<
+      {
+        list: BatchCancelOrderResultV5[];
+      },
+      'order.cancel-batch',
+      BatchOrdersRetExtInfoV5
+    >
+  > {
+    return this.wsClient.sendWSAPIRequest(
+      WS_KEY_MAP.v5PrivateTrade,
+      'order.cancel-batch',
+      {
+        category,
+        request: orders,
+      },
+    );
+  }
+
   /**
    *
    *