Dancers of a local ballet troupe demonstrate movements during an open course on live stream, in east China's Shanghai, Feb. 29, 2020. Due to the novel coronavirus outbreak, the art group has canceled its on-site open course and moved it online. (Xinhua/Ren Long)

Dancers of a local ballet troupe demonstrate movements during an open course on live stream, in east China's Shanghai, Feb. 29, 2020. Due to the novel coronavirus outbreak, the art group has canceled its on-site open course and moved it online. (Xinhua/Ren Long)

Dancers of a local ballet troupe demonstrate movements during an open course on live stream, in east China's Shanghai, Feb. 29, 2020. Due to the novel coronavirus outbreak, the art group has canceled its on-site open course and moved it online. (Xinhua/Ren Long)

Dancers of a local ballet troupe demonstrate movements during an open course on live stream, in east China's Shanghai, Feb. 29, 2020. Due to the novel coronavirus outbreak, the art group has canceled its on-site open course and moved it online. (Xinhua/Ren Long)