What vegetable originating near the Beijing region of China is used in Haejang-guk?
Haejang-guk:  It usually consists of dried Napa cabbage, vegetables and meat in a hearty beef broth. Napa cabbage:  "pekinensis" or "Brassica rapa" Pekinensis Group) is a type of Chinese cabbage originating near the Beijing region of China, and is widely used in East Asian cuisine.
i don't know