On March 20, 2016, Huayi Brothers "H Plan" announced that the film was put on the agenda again
. On November 23, director Hu Guan released the preparatory progress of "The Eight Hundred" and announced that the film has "eight male leading actors"
.
On the afternoon of May 4, 2017, the film held a film conference in Beijing and announced the recruitment of 1,000 actors. On September 7, the film party held a "hard power" theme conference at the Shanghai Sihang Warehouse Memorial Hall, and revealed that the film will be shot with an ALEXA 65mm digital camera
; on the 12th, the film party released a pilot trailer and announced it in the film. heroine.
On February 6, 2018, the film's first set photos were released. On June 15th, the director brought the film to the opening of the Shanghai International Film Festival; at the same time, the film was selected as the strongest film list in the sixth season of Huayi Brothers 2018-2019 "H Plan"
.
The first trailer for the film was released on March 6, 2019. On April 15, the film party released a poster and announced that the film will be released in 2019
; on the 19th, the film company officially announced the starring and participating actors list for the first time
; on May 23, the film company released the actor's appearance and the "Hero is Unknown" version of the poster for the first time.
. At the beginning of June, the film announced the withdrawalit was originally scheduled to be released on July 5, but was withdrawn.
On August 2, 2020, the film party announced that the film will be released on August 21, and released the finalized poster
; on August 6, the ending song MV jointly sung by Na Ying and Italian blind tenor Andrea Bocelli was released.
; On the 9th, it was announced that the screening will be opened in advance on August 14
; on the 14th, the film party released an overseas version of the poster, announcing that it will be released in North America, Australia, New Zealand and other countries and regions from August 28
; in September, the film will be released " The "Night Attack" version of the trailer revealed to the audience the most intense warehouse frontal shootout in the film
; then, the film announced that the key confirmation was postponed for one month, and the film would be extended to October 21
; on September 16, the film was released Included in the 5 chapters of Huayi Brothers' "H Plan" season seven film list, remember the glorious chapter of the era
; on the evening of the 20th, the film won the 2020 global box office champion
; on October 10th, the film's key was extended again, and the release was extended until November 21
.
On August 25, 2021, a Japanese trailer was released for the film, which was announced to be released in Japan on November 12
.
