In March Guan competed at the 2019 City of Jesolo Trophy where she placed ninth in the all-around and sixth on vault and floor exercise. In May she competed at the Chinese Championships where she placed eighth in the all-around. Guan was later selected to represent China at the inaugural Junior World Championships alongside Ou Yushan and Wei Xiaoyuan. While there she helped China finish second in team final, behind Russia and ahead of the United States. Individually Guan finished sixth in the vault final. She finished the season competing at the Chinese National Youth Games where she finished fourth in the all-around, first on vault, sixth on uneven bars, and second on balance beam behind Ou.