1. wholesale market: you can go to the local food wholesale market or farmer's market to find wholesalers who supply semi-finished roast chicken. In the wholesale market, you can buy a large number of semi-finished roast chicken at a lower price.

2. Catering suppliers: Many suppliers who provide ingredients and semi-finished products for restaurants, fast food restaurants, hotels and other catering enterprises have a variety of semi-finished roast chicken to choose from.

3. Online wholesale platform: Many B2B e-commerce platforms now provide wholesale services for food and ingredients. You can buy semi-finished roast chicken online through these platforms, such as Alibaba, JD.COM Mall and Meituan.

4. Direct contact with the manufacturer: Sometimes direct contact with the manufacturer of semi-finished roast chicken will get a more favorable price. You can find the contact information of the manufacturer through official website or other channels to negotiate and purchase.