A string quartet of the Xi'an Symphony Orchestra performs during a concert livestreamed on the internet in the Emperor Qinshihuang's Mausoleum Site Museum on April 22, 2020. (Photo: China News Service/Zhang Yuan)

A string quartet of the Xi'an Symphony Orchestra performs during a concert livestreamed on the internet in the Emperor Qinshihuang's Mausoleum Site Museum on April 22, 2020. (Photo: China News Service/Zhang Yuan)

A string quartet of the Xi'an Symphony Orchestra performs during a concert livestreamed on the internet in the Emperor Qinshihuang's Mausoleum Site Museum on April 22, 2020. (Photo: China News Service/Zhang Yuan)

A string quartet of the Xi'an Symphony Orchestra performs during a concert livestreamed on the internet in the Emperor Qinshihuang's Mausoleum Site Museum on April 22, 2020. (Photo: China News Service/Zhang Yuan)