Zhang Tian'ai, also known by her English name Crystal Zhang, is a Chinese actress and model. She is best known for her breakout role in the 2015 hit web-drama "Go Princess Go". Following her fame with "Go Princess Go", Zhang was succeedingly cast in bigger projects. In 2016, she starred in the romance film "I Belonged to You" alongside Deng Chao. The film was a commercial success and earned more than 800 million yuan ($118 million USD) at the box office.