He entered the Professional Children's School and the Mannes College of Music, where he studied ear training with Marie Powers, theory with Robert Cuckson, and piano with Edward Aldwell.
Sun was the first prize winner of the 7th National Chopin Piano Competition of the U.S in 2005 and the first International Piano-e-Competition in 2002.
Named one of the Musicians of the Year 1996 by the Village Voice at age 15, the now 37-year-old pianist has performed in many of New York's concert halls, including Alice Tully Hall, where his performance of Ravel's Concerto in G was praised by The New York Times as a "stunningly fluid reading."
He has been heard in recital in much of the United States, Japan, China, France, Spain and Italy.
Recent appearances include concert tours of Spain, China, and Japan, and concerto engagements with the Richmond and Winnipeg Symphonies, the National Spanish Orchestra, the Macau Orchestra, and the Hong Kong Sinfonietta.