On June 22, 2018, the film party released a preview and a poster for the finalization, officially announcing the finalization
; on July 6, the film released a set of scene designs showing the near-future world settings in the film
; July 13 , The film released the "memory companion" trailer
; July 17, the film party released the "cold and warm companion" version of the poster
; July 19, the film party released the robot character poster
; July 23, launched the mech in Shenzhen Happy Valley Theme Park The first stop of the national tour
; on July 31, the film party announced that it would withdraw the film in order to meet the international release rhythm in China
; on August 6, the film party attended the 2018 China International Digital Interactive Entertainment Exhibition
.
On June 6, 2019, the film party released a set of posters and announced that the film will be screened in Mainland China on July 26, 2019
; on June 22, the film will be screened at the 22nd Shanghai Film Festival
. On July 5, the filmmaker announced that it would be released on July 19
. On July 11, the film crew released new posters and fragments of easter eggs
. On July 22, the crew exposed the overseas production special
. On July 28, the film studio released the episode "Stars in the Corner" sung by Yuan Liyuan
.
