Photo taken on Jan. 22, 2021 shows the interior view of the National Speed Skating Oval in Beijing, capital of China. The National Speed Skating Oval of Beijing 2022 Winter Olympics in downtown Beijing has finished ice-making trials. Despite the COVID-19 pandemic, the National Speed Skating Oval, locally known as the "Ice Ribbon", was among 12 competition venues for Beijing 2022 completed by the end of last year. (Xinhua/Ju Huanzong)
