Ni studied at the Shanghai Conservatory of Music and later at the San Francisco Conservatory of Music and the Juilliard School; subsequently, she studied privately with William Pleeth in London.

She made her Chicago Symphony debut in 1997 with Christoph Eschenbach at the Ravinia Festival. She has also performed with the San Francisco Symphony, the Orchestre National de France, the Finnish Radio Symphony, the Houston Symphony and the Shanghai Symphony. In addition, she has given recitals at Washington's Kennedy Center and Smithsonian Institute, New York's Weill Recital Hall and London's Wallace Collection.

The Philadelphia Orchestra has also announced the appointment of Daniel Han to the first violin section. The Lexington, Kentucky native has been a member of the Minnesota Orchestra's first violin section since 2005; he was previously a member of the Fort Worth Symphony Orchestra and guest concertmaster of the Daejeon Philharmonic in Korea.

He received his bachelor's and master's degrees and artist's diploma from Boston University. He initially trained with Dorothy DeLay at the University of Cincinnati College-Conservatory of Music Preparatory Department.

Han has attended the Aspen Music Festival, Kneisel Hall, and Bravo! Vail Valley Music Festival, where he worked with Janos Starker, Seymour Lipkin, Ida Kavafian and members of the Juilliard, Tokyo and Orion String Quartets.