In March Wei competed at the 2019 City of Jesolo Trophy where she placed fifth in the all-around, on balance beam, and on floor exercise and placed seventh on uneven bars. In May she competed at the Chinese Championships where she placed tenth in the all-around. Wei was later selected to represent China at the inaugural Junior World Championships alongside Ou Yushan and Guan Chenchen. While there she helped China finish second in team final, behind Russia and ahead of the United States. Individually, Wei finished sixth in the all-around and won two medals in the event finals: silver on balance beam behind Elena Gerasimova and bronze on uneven bars behind Vladislava Urazova and Viktoria Listunova.