In Urine Circle Bacteria Wanted, male and female urethras are represented as two bridges to islands in the middle of a lake.

The male is thin and long, while the female bridge is wide and short, the illustration using a vivid Chinese style to help communicate scientific information – in this case the differences between the two sexes' urethras.

In recent years an increasing number of scientists and tech professionals have engaged the field of popular science, producing a diverse body of work.

Currently the biggest issue facing popular medical science is balancing in-depth scientific information with accessibility.

Academician Han Qide of the Chinese Academy of Engineering said, "Dr Song's series has made a breakthrough in this respect. He creatively unifies illustrations and paintings, the science and the art. Good science work should be easy for the masses to understand but have depth in its content, and Dr Song did that."