Keywords: suancai, suan cai, 酸菜, Chinese pickled vegetables, Chinese sauerkraut, fermented mustard greens, pickled napa cabbage, suancai yu, what is suancai, Dongbei cuisine, Sichuan food
Summary: Suancai (酸菜) is a traditional Chinese fermented vegetable, often translated as “sour vegetable” or “Chinese sauerkraut.” Made primarily from napa cabbage in Northern China or mustard greens in the South, it's a staple ingredient prized for its tangy, savory, and complex flavor. Suancai is not just a side dish but a core component in many famous recipes like the hearty 酸菜鱼 (suāncài yú, fish with pickled greens), adding a signature appetizing sourness to stews, soups, and stir-fries.