Description

Sweet Bean Sauce (often labelled as Tianmianjiang or Tenmenjan) is a thick, dark, and savory-sweet Chinese fermented paste made primarily from wheat flour. 
Here is a description for a 500g pack/jar of Sweet Bean Sauce:

Product Description
Flavor Profile: A savory, rich, and mellowly sweet paste with a deep fermented umami kick. It is less salty than regular miso and has a pleasant, mild sweetness.
Texture & Color: Thick, smooth, and glossy paste with a dark reddish-brown to almost black color.
Key Ingredients: Primarily fermented wheat flour, salt, and sugar. It may also contain soy sauce or fermented soybeans.
Culinary Uses:Stir-fry & Braising: Essential for dishes like Twice-Cooked Pork, Beijing-style shredded pork, and various noodle dishes.
Dipping Sauce: Excellent dip for Peking Duck, roasted meats, or raw vegetables like cucumbers and green onions.
Noodle Topping: A key ingredient in Zhajiangmian (Chinese soybean paste noodles).
Storage: Keep in a cool, dry place. Refrigerate after opening.
Origin: Commonly produced in China or Japan (often branded as Tenmenjan in Japan). 
Note on Weight: A 500g unit is generally a large jar or container, ideal for regular users, restaurants, or home cooks who frequently prepare northern Chinese cuisine. It is sometimes confused with Hoisin sauce, but Sweet Bean Sauce is less spiced and more savory.