Geng Na (C), once a member of a Peking University Third Hospital medical team dispatched to Wuhan to support the fight against COVID-19, stands in front of her portrait while talking with visitors during an exhibition titled "100 Photographers Focus on COVID-19", which displays 80 images taken by top Chinese photographers during the COVID-19 pandemic, at China World Mall in Beijing, capital of China, Aug. 1, 2020. (Xinhua/Lu Peng)