The term 'Qingdao catering signboard' refers to the signage or招牌 found outside restaurants and eateries in Qingdao, China. These signs are typically used to display the name of the restaurant, its type of cuisine, and sometimes its operating hours. They can range from simple, hand-painted signs to more elaborate, neon-lit displays. Qingdao, known for its seafood and local delicacies, has a variety of catering signboards reflecting its culinary culture.