The Wukesong Stadium in Beijing is the venue for Olympic ice hockey test events this month. The stadium will expand what's being called a "closed-loop management area" for COVID-19 containment on Friday. Signs and barriers are in place to warn and block unnecessary entry. Robots and smart devices are in place to help keep the risk of COVID-19 transmission to a minimum. CGTN reporter Cen Ziyuan shares details from the site.