How can I add clothes to Douyin's own showcase with pictures I took?

In my personal homepage, my e-commerce showcase, in the "e-commerce toolbox" in the upper right corner of the page, add products to the product showcase management, Taobao products, and then copy and paste the Taobao code of the product. This operation is relatively simple. Merchants can see it as long as they enter the page. In this way, the product is successfully added to the Douyin showcase