Complex sentence: The boyfriend in her memory, Chen Yidu (Wang Kai), is now her rival at work, while her childhood best friend, Huo Xiao (Kimi Qiao), is now her fiancé.
Split into simpler sentences: The boyfriend in her memory, Chen Yidu (Wang Kai) is now her rival at work. While her childhood best friend, Huo Xiao (Kimi Qiao) is now her fiancé.