Note Chinkiang vinegar is a black rice vinegar popular in southern China, where it is considered the best of its kind. Bean sauce, also known as douban jiang or min si jeung in Cantonese, is made from soy beans. Depending on the brand, it can be very salty, so use sparingly. Similar to miso, it is wonderfully versatile and keeps almost indefinitely in the refrigerator. When asking for douban jiang, insist on the variety without chilli. Chinkiang vinegar and bean sauce are available from Asian grocery stores.