Back to the Past (Chinese: 尋秦記) is an Hong Kong historical science fiction action film directed by Ng Yuen-fai and Jack Lai, with action direction by Sammo Hung. The film is a continuation of the 2001 television series, A Step into the Past, which was based on Huang Yi's novel, The Chronicles of Searching Qin. It stars the original cast of the series Louis Koo, Jessica Hsuan, Raymond Lam, Sonija Kwok, Joyce Tang, and Michelle Saram reprising their roles from the series. Produced by Koo's One Cool Film Production, filming for Back to the Past in April 2019 in Guizhou and wrapped up on 7 July 2019.

On 16 March 2021, the first teaser trailer for the film was released.