In every epidemic since 2020, Liu recorded the most touching stories or scenes he saw and heard, forming a map of "epidemic prevention and control". The vast number of medical workers who fought in the front line, as well as township cadres and volunteers who worked selflessly in the streets and alleys, became the main objects of his description.

In his creation, Liu refines and summarizes the image in a documentary way, no matter how many people or more than a dozen people do it in one go. Creation has sharpened skills and washed the mind, hoping to inspire and enlighten readers.

In the face of repeated delays in the COVID-19 epidemic, the people of China made concerted efforts to fight the epidemic. From medical staff and community workers fighting in the front line to truck drivers and courier brothers who continue to protect people's livelihood, to consciously wearing masks and actively detecting nucleic acids, every move has become a needle in the dense epidemic prevention network. China has a large population. Once the virus spreads all over the country, the consequences will be very serious, and the anti-epidemic achievements already made will be greatly reduced or even abandoned. There are no outsiders fighting the epidemic, and there are no bystanders in the prevention and control work. At present, we need everyone's understanding, tolerance, participation and action to shoulder the responsibility of protecting our own health, family health and group health.

Epidemic prevention and control is a systematic project, and returning to normal is our common wish.