Actors perform during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018. (Photos: Xinhua)

Actors perform during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.

Actress Nathalie Franceschi performs during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.

Actors perform during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.

Actors perform during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.

Actress Jolana Fogasova performs during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.

Actress Jolana Fogasova performs during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.

Actors perform during a rehearsal for opera "Carmen" at Shaanxi Opera House in Xi'an, northwest China's Shaanxi Province, Oct. 24, 2018.