Yu Tongtong's eggshell painting of the solar term Clear and Bright. [Photo provided to chinadaily.com.cn]

According to Yu, painting on eggshell is more accessible than eggshell sculpture that has strict requirements.

"You could either choose a real eggshell or a wooden model of the shell to start," Yu said.

Yet, it is still a challenge to paint on the curved surface of an eggshell. It takes more time and skills than painting on common paper.

The artist got to know the 24 solar terms at a young age. Before creating her eggshell solar term series, she researched them thoroughly.

"I plan to create more eggshell painting based on traditional Chinese culture," Yu said.