To enable the live video e-commerce product promotion function, you can follow the steps below:

1. Select a live broadcast platform: Select a suitable live broadcast platform, such as Douyin, Kuaishou, Taobao Live, Weibo Live, etc.

2. Register and open an account: Register an account on the selected live broadcast platform, and complete the necessary information such as real-name authentication according to the requirements.

3. Prepare live broadcast equipment: Prepare the equipment for live broadcast, such as mobile phones, cameras, etc., and ensure that the network connection of the equipment is stable.

4. Configure live broadcast tools: According to the requirements of the selected live broadcast platform, download and configure the corresponding live broadcast tools, such as Douyin Live, Kuaishou Live, etc.

5. Create a live broadcast room: Create a live broadcast room on the live broadcast platform, fill in the live broadcast title, description and other information, set the live broadcast time, etc.

6. Prepare products: Select the products to be promoted, and prepare related promotional materials, such as product pictures, introduction text, etc.

7. Start live broadcast: Follow the instructions provided by the live broadcast platform to start live broadcast, display products and conduct sales promotion.

8. Interact with the audience: Interact with the audience, answer their questions, introduce the characteristics and advantages of the products, provide purchase links, etc.

9. Receive orders: Receive orders in a timely manner according to the audience's purchasing needs, and handle payment and delivery of orders.

10. End of live broadcast: After the live broadcast, summarize the sales situation, process the remaining orders, and carry out subsequent customer service work.

It should be noted that different live broadcast platforms may have different regulations and requirements, and the specific operation steps may be different. It is recommended that before opening the live video e-commerce sales function, you should first understand and familiarize yourself with the relevant rules and operating guidelines of the selected platform to ensure the smooth implementation of live e-commerce activities.