This Professor of Trumpet at the Central Conservatory in Beijing, China has composed an extraordinarily well organized 40-page book of flexibility studies which spans the elementary to advanced levels.
A new standard text for brass embouchure flexibility which deservedly joins the pantheon of other such studies by Schlossberg, Irons, Colin, Smith, etc., it has become a staple of the trumpet pedagogical literature since 1996.
BQ 38.