 Before, the recording of the note positions between "hui" were only approximations.For example, to play sol on the seventh string, the position the player must stop is between the 7th and 8th hui.The tablature of Ming times would only say "between 7 and 8" 「七八日(間)」 or for other positions "below 6" 「六下」 or even say "11" 「十一」 (when the correct position is slightly higher).