Let me summarize it, for the business people in the audience, with three rules, three basic rules. One, don't say you're authentic unless you really are authentic.
Yet he also absorbed the daring new techniques that were emerging at the time, illustrated here by the work of Masaccio and Uccello with their grasp of three- dimensional form and the rules of perspective.
The music is drawn from an extensive traditional repertoire named after ethnicities, towns or flowers ( Tu People s ''ling , '' White Peony ''ling'' ), and lyrics are improvised in keeping with certain rules for example, verses have three, four, five or six lines, each made up of seven syllables.