A booth displaying China's Sinovac Biotech Ltd. shows a COVID-19 vaccine candidate during the 2020 China International Fair for Trade in Services (CIFTIS) at Beijing Olympic Park on September 5, 2020 in Beijing, China. As China recovers from the COVID-19 epidemic, about 2,000 Chinese and foreign enterprises will participate and showcase their newest technology in public health and digital technology in the China International Fair for Trade in Services.