Trombone (Pinyin: Ludi), also known as Changming, Tongjiao, Zhaojun, Horse Blowing, Trumpet, etc. It is Yao, Zhuang, Miao, Yi, Hani, Buyi, Tujia, Uyghur, Han and other nationalities lip-vibrating and chirping musical instruments. Yao language called Dangling. It is called Dabala in Yi language. The Bouyei language is called Manglie. Uyghur is called Kanai. The Han people call it the tuba, long tip, trumpet, aces and so on. It is popular all over China, especially in Guangxi, Yunnan, Guizhou, Xinjiang and other provinces and regions.

The whole body of the trombone is made of thin copper sheets and consists of upper, middle and lower copper tubes. The upper section is the mouth section, the top has a pot bottom-shaped mouthpiece, the middle section is the telescopic section, and the lower section is the trumpet section. The tube body is retractable and retractable. When not in use, the upper and middle sections can be retracted into the speaker section, which is very convenient for carrying and storage. Trombones of different ethnic groups and regions have different specifications and lengths.

All the trumpet-type air-sounding instruments in ancient my country are generally called horns. They were originally played with natural horns, and later developed to be made of bamboo, wood, leather, copper and other materials. The trombone was derived from ancient horns.