Sun Zhen Ni is a Chinese singer and actress born in Hongkou District, Shanghai, China. She is of Han Ethnicity with one-quarter German-Jewish ancestry through her paternal grandmother.

She was introduced to SNH48 by a friend and successfully auditioned to join the group while still a student at the Shanghai Paddington Bi-Lingual School. She Joined SNH48 as a trainee on January 18, 2016 and was promoted to Team HII on March 3, 2016. She left SNH48 on August 28, 2023, to become an actress, but she stayed under the Agency STAR48.

In 2019, she decided to enroll in drama school and focused on studying for the National College Entrance Exam. She was accepted into China's three most prestigious drama schools: Beijing Film Academy, Central Drama Academy and Shanghai Theatre Academy. She is the only SNH48 member to achieve this accomplishment. She ultimately decided to enroll at Shanghai Theater Academy, where she ranked 5th in the nation.