Sichuan cold salad is fragrant because of the addition of special red oil for cold salad. Red oil is a spicy cooking material and a unique technology in Sichuan cuisine. Red oil is mainly made from Sichuan pepper mixed with vegetable oil and other spices by slow fire.

Cold salad is a dish made by adding red oil, soy sauce, garlic and other ingredients into the raw materials, and after preliminary processing and blanching. According to the classification of red oil, it can be generally divided into three categories: spicy, spicy and spiced. Cold salad has a profound history and culture, which can be traced back to the Zhou Dynasty and the pre-Qin period.