Cai is from Ningbo, Zhejiang. In August 2005, he graduated from Jena University with a master's degree in DaF (Teaching German as a Foreign Language). At present, she is a German teacher at the School of Foreign Languages of Ningbo University and the deputy director of the European Department. Her major is German teaching and German cultural studies. In addition to publishing many related academic papers, his published works include Approaching Germany-A Social and Cultural Perspective of Contemporary Germany and Eternal Classics: A Glance at German Automobile Culture.