Yu (wind instrument)
The is a free reed wind instrument used in ancient China. It is similar to the sheng, with multiple bamboo pipes fixed in a wind chest which may be made out of bamboo, wood, or a gourd. Each pipe contains a free reed, which is also made of bamboo. Whereas the sheng is used to provide simultaneous tones in harmony, the is played in single lines melodically. The instrument was used, often in large numbers, in court orchestras of ancient China but is no longer used.
History
Although the is now obsolete, it is known to most Chinese speakers through the saying, meaning "to fill a position without having the necessary qualifications." The saying is derived from the story of, a man who joined the royal court orchestra of King Xuan of Qi, the ruler of the State of Qi as a player. Although the man did not actually know how to play this instrument, he knew that the orchestra had no fewer than 300 players, so he felt secure that he could simply pretend to play, and thus collect a musician's salary. Upon the king's death, Nanguo was eventually exposed as an impostor when the king's son Min, who had succeeded his father as king, requested that the musicians play individually rather than as an ensemble. On the night before he was to play, Nanguo fled the royal palace as he feared being punished for lying about his instrumental abilities, never to return.