Ash Is Purest White (Chinese: 江湖儿女; 'Sons and Daughters of Jianghu') is a 2018 Chinese drama written and directed by Jia Zhangke. The story is loosely based on the leader of a gang from Jia Zhangke's childhood, whom he had admired as a role model.

The film had its world premiere at the main competition of the 2018 Cannes Film Festival on 11 May 2018, where it was nominated for the Palme d'Or. It was theatrically released in China on 21 September 2018. Like the rest of Jia's films, it opened to widespread acclaim.