JD.com. JD.com is a professional online shopping mall for Miyun Longtan instant noodles in China. Longtan instant noodles are a famous trademark in Beijing and are produced in Miyun, Beijing. It tastes delicious, extremely light, and has a lingering fragrance on your lips and teeth. It is the best instant noodles. Longtan instant noodles are only sold in shopping malls, supermarkets and small shops in Beijing and its surrounding provinces.