First prize winners (from 2nd L to 5th L) of the 30th European Union Contest for Young Scientists (EUCYS) pose for a photo at the awarding ceremony in Dublin, Ireland, Sept. 18, 2018. (Photos: Xinhua)

Female prize winners of the 30th European Union Contest for Young Scientists (EUCYS) pose for a group photo at the awarding ceremony in Dublin, Ireland, Sept. 18, 2018.

Zhang Sijia (2nd L), a third prize winner of the 30th European Union Contest for Young Scientists (EUCYS), poses for a photo with prize awarding guests at the awarding ceremony in Dublin, Ireland, Sept. 18, 2018. Zhang Sijia, an 18-year-old Chinese student, was awarded here on Tuesday the third prize of the 30th EUCYS, the highest prize ever won by China since its participation in the contest in 2003.