Douyin's shopping window is realized through its "Short Video E-commerce" function. This feature allows brands and merchants to open their own stores on Douyin and display products directly to users, who can purchase them directly while watching videos.

To use Douyin's shopping window, you need to become a certified brand or merchant first. Then, after creating an account and completing identity verification, you can upload detailed information such as product information, prices, and pictures, and associate them with the corresponding short videos.

When users browse related content, they will see a button labeled "Buy Now" or a link similar to "Go to Taobao APP to Buy". After clicking the button or link, users can enter the online store page you set up to place an order.

In short, if you want to open your own e-commerce platform on Douyin, make sure to follow all relevant regulations and follow the guidelines to achieve the best results.