[1] The film follows the love story of An Ran, a student of Beijing Normal University, and Qi Xiao, a Taiwanese photographer.

[2] In 2015, Chyi Chin and Rao Xueman discussed making his song Possibly in Winter or Around the Winter Season (大约在冬季) into a film.

[3] Based on the song, Rao Xueman wrote a novel, which was published in 2018.

[5] This film was shot in Beijing, Tianjin, Taipei and Los Angeles.

[4] On October 11, 2019, the first official trailer for the film was released along with a teaser poster.