1. Ping An Pocket Bank APP: You can get coupons by logging in to the bank APP every day, which can reduce the product price.

2. CITIC Bank, Bank of Communications, Minsheng Bank and Ping An Bank: You can buy coupons by logging in to the apps of these banks every day. For example, Ping An Bank 49 yuan can buy vouchers from 69 yuan, CITIC Bank credit card can enjoy a 10% discount on Bigger, and Minsheng Bank credit card 10 yuan can enjoy Bigger buffet.

3. Online shopping: Search for "buffet group purchase coupons" on major e-commerce platforms, and you can see various products of buffet group purchase coupons, and you can choose the appropriate group purchase coupons according to your own needs.

4. WeChat official account: Big Pizza's English name is Bigpizza, and they will post coupons on WeChat official account. Pay attention to the official account of WeChat WeChat, and it is most cost-effective to buy coupons.

Please note that the above information may change due to changes in business policies and markets. It is recommended that you check it carefully before buying.