These two dishes will be learned when doing the branch task of Jiangdu (that is, the task of Li Shifu on the first floor of Changping Inn). If you don't do the task and just want to buy recipes, you can go directly to the shop opposite the tea stall in Jiangdu suburb (a little in front of the filing point), and there are also some cooked dishes that are difficult to cook, so you can buy some ~