And as for Su San, she is a woman from the Ming Dynasty (1368-1644), who is framed for murdering and sentenced to death.

Speaking about the performance, Shi says: "There has long been a rule that students of the four schools stick to their respective styles of performance.

"The idea for me to present the four classic roles came from my fans, who wrote me letters and gave me advice.

"In the beginning, I thought it was a crazy idea," says the 46-year-old.

"It was not only physically challenging but also risky to push the boundaries.

"Each of the four styles has its own singing technique - such as higher or lower vibration and how to make the words sound.

"The pieces were designed for the four styles so I learned them from the beginning," she adds.

"I studied the performances of other schools not because I wanted to imitate them, but because I wanted to learn the basics about them and improve my artistry."

But Shi's career shows that she is not afraid of taking risks.

She began her Peking Opera training as a wu dan, or a female martial arts performer, at the Shanghai Folk Opera School at the age of 9.

And when she turned 15, Shi took up qing yi roles, which are young or middle-aged women characters that exude refinement and grace, and became a disciple of the Mei Lanfang school. She later joined the Peking Opera Troupe of Shanghai, where she performed a series of classic roles once interpreted by Mei Lanfang and his students.

Then, in 1999, she collaborated with Oscar-winning composer Tan Dun, as well as presented a Peking Opera adaptation of Victor Hugo's classic novel Notre Dame.

In 2017, she combined a Peking Opera classic, Farewell My Concubine, with chamber music in Shanghai. The production was staged at Princeton University and the Metropolitan Museum of Art in New York last year.

The versatile performer also learned Kunqu Opera and took part in a Kunqu Opera production of Peony Pavilion by Ming Dynasty dramatist Tang Xianzu along with Kunqu Opera actor Zhang Kun in Shanghai in 2012.

"The 600-year-old Kunqu Opera enables me to control my breath and to better understand my roles," says Shi.

Peking Opera artist Jin Xihua and Kunqu Opera artist Cai Zhengren, both 77 years old, will join Shi's upcoming shows in Beijing.

Speaking about Shi, Cai, who will perform with Shi in the Peking Opera piece Jin Yunu, says: "She is innovative in her art and innovation is the key to keep the art alive."