The main reason is that Lanzhou Ramen only had the Beef Noodle Industry Association before Lanzhou. This association was composed of scattered operators and did not form a brand effect. This makes Lanzhou Ramen not eligible to be registered under the current situation. Due to the possibility of trademark, no one can use Lanzhou Ramen as a trademark to operate, so the so-called Lanzhou Ramen and authentic Lanzhou Ramen are legal all over the country. Of course, there are also some famous Lanzhou beef noodle brands that have opened branches across the country, such as Ma Zilu Beef Noodles, Chinese Lanzhou Beef Noodles, etc. Hope it helps you