Gao is among the 27 students currently taking the tea art class in the school, and about 85 percent of her classmates are left-behind children.

According to Principal Yang Jinpeng, the school has offered tea art classes to students in grades three to six since 2012, with more than 30 students signing up each year.

"Many children become more optimistic and confident after joining the tea art classes," Yang said. "We hope that through tea art and other extra-curricular classes, children can forge companionship with their classmates and teachers and learn something meaningful."