Liu Fangxi began her music education at the age of four. She was accepted into the primary school attached to the Central Conservatory of Music in Beijing at the age of 10 and studied with Prof Tong Weidong. At 15, she was awarded a full scholarship to study at the Hong Kong Academy of Performing Arts where she was a student of Michael Ma. She holds a Bachelor of Music degree in violin performance and a Bachelor of Arts degree in Art History of Asian Studies from the Bard College Conservatory of Music in New York, where she studied with Jiang Yiweng under a full scholarship. During her studies, she was appointed Concertmaster of the college orchestra, and went on tours of Europe and Asia. In 2015 she represented the college on tour in Hong Kong with the College Director Robert Martin and violist Steven Tenenbom. After graduating in 2016 she joined The Orchestra Now at the Bard College. She has participated in masterclasses with Cho-liang Lin, Xue Wei, Midori, Vadim Repin, Arnold Steinhardt, Shmuel Ashkenasi, Ani Kavafian, Ida Kavafian, Daniel Phillips and Frank Huang.
Fangxi made her solo debut with the China Radio and Film Symphony Orchestra at the Zhongshan Concert Hall in Beijing. She has participated in music festivals in Asia, Europe and North America, including the Morningside Music Bridge International Music Festival in Gdańsk, the Bowdoin International Music Festival in Maine and the Juilliard international series in Hong Kong.
She was awarded the Special Prize at the 15th Andrea Postacchini International Violin Competition in Italy. Sponsored by the Robert H. N. Ho Family Foundation, she became a fellow of the Hong Kong Philharmonic Orchestra for two years.
Once praised by JoAnn Falleta for her excellent leadership and beautiful playing in Scheherazade, Fangxi became a First Violinist with the HK Phil in 2018.