In what country does baechu originate?
Napa cabbage Napa or nappa cabbage ("Brassica rapa" subsp. "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. Since the 20th Century it is also a widespread crop in Europe, America and Australia. In much of the world, this is the vegetable referred to as "Chinese cabbage".
Naengmyeon Naengmyeon (냉면 ; 冷麵 , in S. Korea) or raengmyŏn (랭면 , in N. Korea) is a Korean noodle dish of long and thin handmade noodles made from the flour and starch of various ingredients, including buckwheat (메밀, "memil"), potatoes, sweet potatoes, arrowroot starch (darker color and chewier than buckwheat noodles), and kudzu (칡, "chik"). Buckwheat predominates (despite the name, it is not a wheat but rather is more closely related to sorrel). Other varieties of naengmyeon are made from ingredients such as seaweed and green tea.