How to shout slogans before taking photos of campus collective graduation photo?

Everyone shouted "eggplant" in unison.

I don't know which photographer was the first, so I came up with a clever way to make everyone shout "eggplant" in unison. The cry of eggplant relaxed the muscles on everyone's face. Moreover, the louder the voice, the more accurate the pronunciation of Mandarin, and the brighter the smile. Eggplant is like a flower, blooming on people's faces.