Chopin's Prelude and Balad's

Chinese pianist Yum Di is partway through a world tour and she's playing Chopin's Prelude and Balad's. The four Balis really I think is one of the most Chopin repertoire, besides technique or musically or maybe structure. She says: "Everything is really the test for the pianist" And that if you monster Chopin it sets you up for most of the composer.