In 2020, Liu and his partner began painting walls free of charge.

Their first work included painting the walls of an ancient town in Chongqing. In about three months, they finished seven wall paintings.

It usually takes Liu about two to three days to complete a simple wall painting and more than a week for an elaborate design.

"I will focus more on Chinese cultural elements in my wall paintings and decorate more walls in villages to draw visitors and help the locals increase their income through tourism," says Liu. "It's my honor and pleasure to have the chance to pretty up the surroundings with my art."