Taobao does not have an official "duplicate goods" function, because duplicating goods may involve intellectual property rights, copyright and other issues. However, if you want to create a similar product, you can follow the steps below:

1. Find the product you want to copy: Find the product you want to copy on the Taobao platform. Click to enter the product details page to view product information, pictures, prices, etc.

2. Prepare product materials: Prepare corresponding product pictures, product descriptions, prices and other information based on the found products. Make sure that the materials you use do not involve infringement, otherwise your store may be punished.

3. Create a new product: Log in to your Taobao seller account and enter the "Seller Center". Click "Publish Product" to start creating a new product. Fill in the product name, select the product category, upload product pictures, etc., and fill in the product description according to the product details.

4. Set the price and shipping fee: Set the appropriate price and shipping fee for your product. You can refer to the pricing of the found product, but it is recommended not to copy it completely to avoid infringement.

5. Submit new products: After verifying that the product information is correct, click the "Submit" button. Taobao platform will review the new products, and after the review is passed, your products will be displayed in the store.

Please note that when creating new products, you must ensure that the product information, pictures, etc. do not involve infringement to avoid adverse effects on your store. At the same time, try to provide unique product descriptions and pictures to increase the attractiveness of the products.