and combined them into one character notation. This meant that instead of having two lines of written text to describe a few notes, a single character could represent one note, or sometimes as many as nine. This notation form was called jianzi pu (減字譜) (literally "reduced notation") and it was a major advance in qin notation. It was so successful that from the Ming dynasty onwards, a great many qinpu (琴譜) (qin tablature collections) appeared, the most famous and useful being "Shenqi Mipu" (The Mysterious and Marvellous Tablature) compiled by Zhu Quan, the 17th son of the founder of the Ming dynasty. In the 1960s, Zha Fuxi discovered more than 130 qinpu that contain well over 3360 pieces of written music. However, many qinpu compiled before the Ming dynasty are now lost, and many pieces have remained unplayed for hundreds of years. Repertoire Qin pieces are usually around three to eight minutes in length, with the longest being "Guangling San", which is 22 minutes long. Other famous pieces include "Liu Shui" (Flowing Water), "Yangguan San Die" (Three Refrains on the Yang Pass Theme), "Meihua San Nong" (Three Variations on the Plum Blossom Theme), "Xiao Xiang Shui Yun" (Mist and Clouds over the Xiao and Xiang Rivers), and "Pingsha Luo Yan" (Wild Geese Descending on the Sandbank). The average player will generally have a repertoire of around ten pieces which they will aim to play very well, learning new pieces as and when they feel like it or if the opportunity arises. Players mainly learn popular well-transcribed versions, often using a recording as a reference. In addition to learning to play established or ancient pieces very well, highly skilled qin players may also compose or improvise, although the player must be very good and extremely familiar with the instrument to do this successfully. A number of qin melodies are program music depicting the natural world. Transcription Dapu (打譜) is the transcribing of old tablature into a playable form. Since qin tablature does not indicate note value, tempo or rhythm, the player must work it out for themselves. Normally, qin players will learn the rhythm of a piece through a teacher or master. They sit facing one another, with the student copying the master. The tablature will only be consulted if the teacher is not sure of how to play a certain part. Because of this, traditional qinpu do not indicate them