Liu starts his work every morning at 8:00 am.

"It usually takes me 10 hours to collect more than 380 nucleic acid samples across the village," said Liu, adding that it takes more than 40 minutes to ride a motorcycle to the farthest villager's home.

"But it would take them about two hours to reach us. So we come to them to save their time," he added.

Liu said that villagers are busy with spring farming as the weather turns warm, medics and village officials try their best to do door-to-door nucleic acid tests.

"Many villagers are elderly. We must not make trouble for them. It is ok for us as we are very young," the 28-year-old man said.

"It shows China's determination to fight against the epidemic." "The dedication of the frontline medics deserve admiration. There are no blind spots in China's epidemic prevention and control," netizens wrote.