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.