Which region of China is known for its spicy cuisine?
Traditionally, there are eight regional categories of Chinese cuisine: Anhui, Cantonese, Hunan, Fujian, Jiangsu, Sichuan, Shandong, and Zhejiang. When you see the word “Sichuan” ( sometimes spelled Szechuan) on the menu, be prepared. Sichuan peppercorns and dried chilies are key to creating the spiciness and depth of flavor of this regional cuisine.
Source: Serious Eats