1. Go to Alibaba's official website and log in to your account.

2. In the search box at the top of the homepage, enter the name of the product or industry you want to find and click the "Search" button.

3. In the search results page, click the "Purchase" tab on the left.

4. In the "Purchase" page, you can select the industry or keyword you are interested in, or filter by time, region, price and other conditions.

5. After finding the purchase information you are interested in, you can click to enter the detailed page to view the buyer's detailed information and requirements, and contact or quote.