It's the meat from the lower part of pork ribs. The meat is very good. And cartilage can also be eaten to supplement calcium. Only some people don't like to eat cartilage. However, it should be noted that there is lymph in that part, and the general chef will carefully remove it before processing, but the chef in the unit canteen may not be very responsible, so be careful when eating by himself, and don't eat lymph. Just remove it.