Artists perform the Su Opera production Guo Ding Hun, or Soul of National Tripods, in Nanjing, capital of east China's Jiangsu Province, Oct. 18, 2019. Based on the true historical event in Suzhou, the opera tells the story of a Suzhou family protecting cultural relics of ancient vessels used for cooking and storing meat. Su Opera, originating in Suzhou, was listed in the first batch of national intangible cultural heritages in 2006. (Xinhua/Li Bo)