Born in Hong Kong, Crystie began piano lessons at four. In 2017, she fell in love with Argentine tango after playing in the CMC Tango Ensemble directed by Scott O'Day. Since then, she has been receiving coaching from maestros such as Hector Del Curto, Pablo Estigarribia, Gustavo Casenave, Hernan Possetti, Nicolas Ledesma, Adrian Enriquez, Cesar Salgan, Julian Peralta, Juan Pablo Gallardo, etc. through workshops and also personal training in Buenos Aires, Argentina. She performed in small ensembles with the guitarist Maxi Larrea and the bandoneonists Alex Roitman, Hugo Satorre, and Leonel Gasso. Ms Shum is a member of a Stowe Tango Music Festival tango orchestra, and also is currently a pianist, vocalist, and arranger in Orquesta Tipica Domo in San Francisco Bay Area. She's also a founding member of groups TangoLuna, Las Tangueritas, and Cuarteto Diagonal. In addition to her piano work, Crystie also plays bandoneon in La Orquesta Fusion Tango. Besides music, she is a social worker with two dogs and a parrot.