The cover image is designed for the Shenzhen Declaration on Plant Sciences by Genlin Jiao, Alice Tangerini and Jun Wen. Photo credits go to Chip Clark, Genlin Jiao, Hong Jin, Sandra Knapp, Steven Manchester, Jun Wen, Bob Wick and Li Zhang. The picture on the top row (right) appeared in the Los Angeles Times on April 7, 2017. See Ge & Wen, pp. 411–414, and Shenzhen Declaration Drafting Committee, pp. 415–416, in this issue.