In order to prepare materials that closely fit the timeline for each role, the director and the team spent a year and a half copying and restoring the computer operating system and various software interfaces for nearly 16 years. All data settings, including the Facebook page and twitter timeline, must fit the character’s own life timeline, and even the speed of each dialogue editing in the screen must be relaxed. In order to convince the audience, the personal data prepared by the director for each role must be accurate to the minute.
Before filming started, the director borrowed Google’s "prototyping" system to take selfies, and also played all the key roles in the film "father", "daughter", "brother", etc., and completed a 100-minute long The provisional version, which is equivalent to making the movie in advance, brings great convenience to the subsequent live shooting and editing.
