Why is jiaozi in Lanzhou Lamian Noodles Store so cheap?

I come from Lanzhou. I really haven't seen any jiaozi in Lamian Noodles Store in Lanzhou, and I've never heard of such a store. I don't know where the landlord has such a Lanzhou Lamian Noodles store. To tell the truth, outside Lanzhou, Lamian Noodles shops in Lanzhou are full of crap, and many local snacks shops in China are the same, but they have deteriorated outside the local area.