She is known for her roles in the motion pictures Blind Detective, Mountain Cry and Seven Killings.
Lang studied with pianist Sheng Yuan at the Central Conservatory of Music in Beijing.
[1] During her college years, she performed at the International Keyboard Institute and Festival in New York and OpusFest in the Philippines.
She began switching to acting in 2011, when she worked on stage with Pu Cunxin in the play Ivanov.
In 2013, Lang appeared in the first of two Johnnie To films, Blind Detective, and has since acted in many movies and TV series.