Changzi County in Shanxi Province is the earliest place in China to produce brass instruments, and enjoys the reputation of "Hometown of Copper Instruments". The craftsmanship of making brass instruments in Changzi has a long history. As early as the first year of the Zhenguan Period of the Tang Dynasty (627), the brass instruments made by the local handmade copper workshops were already all over the country and well-known. In 2008, the craftsmanship of making brass instruments in Changzi was selected into the second batch of national intangible cultural heritage list in my country. The production of brass instruments in Changzi is mainly made of copper and tin. It can only be completed after multiple processes such as casting, forging, forming, heat treatment, cold shaping, polishing and tuning. It takes many years of manual experience and the craftsman's own understanding to make a fine brass instrument. Many processes are difficult to be replaced by modern technology. The most critical part is the two links of forging and tuning. When forging, four people should swing the hammer together to forge to determine the thickness and flatness of a brass instrument. Tuning is the last step and also the most difficult part. A good tuner must be familiar with the tunes of various dramas and have rich knowledge of music theory, so that he can achieve the goal of hammering a gong thousands of times and finally getting the tone with one hammer. These production techniques are the crystallization of wisdom summed up by Chinese folk craftsmen in their long-term labor, and can be said to be an extremely precious historical heritage. The production technique of Changzi bronze musical instruments is a typical representative of manual work, which is mainly passed down through family inheritance and master-apprentice inheritance. At the same time, Changzi bronze musical instruments are closely related to local dramas and religious music. The instrument is suitable for accompaniment of operas such as Jin Opera, Peking Opera, Ping Opera, Bangzi Opera, and Taoist and Buddhist music. The diversity of local dramas and religions makes bronze musical instruments have a wide range of social needs. (No pictures yet, welcome to provide.) (No pictures yet, welcome to provide.)