
The image is a photograph of a sign on a wall in a museum. The sign is in Chinese and has a blue background with white text. The text is written in both English and Chinese characters. 

On the right side of the sign, there is a black and white illustration of a pyramid-like structure. The pyramid appears to be made up of multiple levels, with the top level being the largest and the bottom level being smaller. The top level is the smallest and has multiple levels. The bottom level is a larger pyramid with multiple levels and a smaller pyramid at the bottom.

The text on the sign explains that the pyramid is a wind instrument, which is used to play musical instruments. It is made of wood and has intricate patterns and designs on it. The wind instrument is typically used in Chinese folk music, as it is a type of wind instrument used in the early 20th century.
