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Locks have not only retained their practical value but have also become precious historical evidence. They reflect the historical development trajectory of woodworking and hardware crafts from one aspect. Looking at locks from their materials, design, mechanical structure, mechanism, carving, calligraphy and painting, they involve multiple disciplines such as woodworking, metallurgy, forging, cold work, art, calligraphy and painting, copper wood carving, and dynamics, physics, geometry, psychology, etc., all of which can be found in locks, reflecting the conditions of social politics, economy, culture, and lifestyle throughout history. After several generations of ingenious craftsmen's invention and improvement, the production of locks can be said to be billions or trillions, making it difficult to count the exact number. Looking at the locks that have been passed down, there are many fine products, which are the crystallization of wisdom of ancient craftsmen. It may be because the lock itself is a kind of item reflecting confidentiality, the lock craftsmen have passed down from generation to generation, and literary men rarely involved in writing books and establishing their own records, leading to few records in historical documents, official histories and unofficial histories, so there is almost a blank in the research on lock art until now. In traditional China, the people are happy to call itOne of the "Five Blessings," this shows the importance of happiness in Chinese culture. The attitude of the Chinese towards life is generally very practical, they love life and strive for a perfect and happy life. Therefore, many things are considered as good news. For example, marriage, passing the civil service examination, meeting old friends on the road, or the visit of relatives and friends.