1. Wholesale market: Wholesale food markets usually provide bulk food purchases, including semi-finished steamed buns and steamed buns. You can go to the local food wholesale market or farmer's market to talk about prices and purchases with suppliers.

2. Food suppliers: Some companies or suppliers specializing in food supply and wholesale provide semi-finished steamed bread and steamed bread. You can search or inquire about the local commercial yellow pages through the Internet, find local food suppliers, contact them, and find out the price and purchase method.

3. Supermarkets: Some large supermarkets provide semi-finished steamed buns and steamed buns, which can be purchased in local supermarkets. Supermarkets will have multiple brands and specifications to choose from, and there will be regular promotional activities to choose products with higher prices.