Yinchuan, the capital of northwest China's Ningxia Hui Autonomous Region, finished the second round of mass COVID-19 nucleic acid testing on Friday.

Since Oct. 17, Ningxia has reported 30 confirmed COVID-19 cases, including 18 reported in Yinchuan.

Among the people working on the frontline of the battle against the pandemic, the post-90s generation has been the backbone force.

Liu Shilong, 21, is a volunteer in the community.

Xie Tong, a 23-year-old policewoman, is dispatched to maintain the order of the testing site.

Wang Wenxia, 27, is a medical worker of testing.