What are ban? What is the typical length in ban of a short solo piece for pipa?

What will be an ideal response?

• Ban are metrical strong beats, equivalent to a Western measure.
• Often solos for pipa--either as short, free-standing pieces or as part of a suite (grouped with other solos into a compilation)--were exactly sixty-eight ban in length.
--Study the accompanying Active Listening guide as you listen to "Da Lang Tao Sha" ("Great Waves Washing the Sand.")