How Long Will I Love U (Chinese: 超时空同居) is a 2018 Chinese fantasy romantic comedy film written and directed by Su Lun, based on an idea by Xu Zheng who also produced the film.

[2] Foreign critics generally note the fine on-screen chemistry between Lei and Tong,[3][4] who previously co-starred in the 2013 TV series Weaning.

Su Lun was hired as director and screenwriter,[6] Xu Zheng read her drafts and gave notes for improvement.

[7] The film pays homage to Alejandro Agresti's The Lake House and Robert Schwentke's The Time Traveler's Wife.

[13][14] According to Box Office Mojo, the film grossed $136.7 million in 4 international markets.