A popular online fantasy novel's movie adaptation to release in July

Popular Chinese actress Crystal Liu Yifei (right) and actor Yang Yang (left) portray two star-crossed lovers in a fantasy film "Once Upon A Time", and the pair promote their upcoming movie on Thursday, March 30, 2017 in Beijing. "Once Upon A Time" is scheduled to hit theatres in China on July 21st.[Photo provided to China Plus]

Popular Chinese actress Crystal Liu Yifei (right) and actor Yang Yang (left) portray two star-crossed lovers in a fantasy film "Once Upon A Time", and the pair promote their upcoming movie on Thursday, March 30, 2017 in Beijing. "Once Upon A Time" is scheduled to hit theatres in China on July 21st.[Photo provided to China Plus]

Chinese actress Crystal Liu Yifei attends a promotional press conference for an upcoming fantasy film "Once Upon A Time" on Thursday, March 30, 2017 in Beijing. "Once Upon A Time" is scheduled to hit theatres in China on July 21st, this year.[Photo provided to China Plus]

Popular Chinese actress Crystal Liu Yifei (left) and actor Yang Yang (right) portray two star-crossed lovers in a fantasy film "Once Upon A Time", and the pair promote their upcoming movie on Thursday, March 30, 2017 in Beijing. "Once Upon A Time" is scheduled to hit theatres in China on July 21st.[Photo provided to China Plus]