Last year, he began a two-year project of painting 100 walls in Yongsheng where he was born. So far, he has completed more than 30 walls.

His artworks also attract curious children who crane their necks to see him paint.

"People love the vibrant colors and funny comics," Liu says, adding that some children even created paintings of their own to show them.

"If our work can sow seeds of deep appreciation in children's hearts and open up new opportunities for their future careers, it would be wonderful," he adds.