This document summarizes the origins and spread of beef noodle soup. It originated in Lanzhou, China as Lanzhou beef noodle soup, which is characterized by tender beef, radish, chili oil, green onions, soft noodles, and a harmonious broth. It spread to Taiwan in the 1950s and developed various regional styles. Taiwan is now known for its beef noodle festivals celebrating the dish's cultural significance. The document outlines key differences between Chinese and Taiwanese beef noodle preparations and cultural roles.