If you want to change the product on the Chinese version of Alibaba homepage, you can follow the steps below:

1. Open the Alibaba website: First, open Alibaba's official website (www.alibaba.com) in your web browser.

2. Log in to your account: If you already have an Alibaba account, log in with your username and password. If you don't have an account, you can click the "Free Registration" button to register a new account.

3. Search for products: In the search box on the homepage of the website, enter the product keywords you want to change, and then click the Search button.

4. Filter results: Use filters to narrow the search results according to your needs. You can filter by price range, product category, etc.

5. Select products: Browse the search results and click on the product you are interested in to get detailed information. You can view product descriptions, pictures, prices, and supplier information.

6. Add to homepage: If you are sure you want to add the product to the homepage, you can find the "Add to homepage" or similar button on the product details page and click it. At this point, the product should appear on your homepage.

Please note that Alibaba's homepage usually displays some recommended or popular products, and you can also browse and select products directly on the homepage according to your needs. In addition, the Alibaba website design and layout may be different, and the specific steps may vary. If you encounter difficulties or problems during the operation, it is recommended to consult the help documents of the Alibaba website or contact Alibaba customer support for more specific help and guidance.